Only A Genius Medical Student Can Pass This Physiology Exam! Trivia Quiz

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1. Channel proteins move transport ions through concentration gradient

Explanation

Channel proteins are integral membrane proteins that form channels in the cell membrane, allowing the passive transport of ions down their concentration gradient. These proteins have a hydrophilic pore that allows specific ions to pass through, facilitating their movement from areas of high concentration to areas of low concentration. This process does not require the input of energy and is therefore considered passive transport. Therefore, it is correct to say that channel proteins move and transport ions through their concentration gradient.

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Only A Genius Medical Student Can Pass This Physiology Exam! Trivia Quiz - Quiz


There is a whole lot that goes into ensuring that the human body works as good as it should. Are you a physiology exam and think that you... see moreknow so much as to tackle the physiology exam below that only geniuses can pass? Well, don’t just guess, take up the quiz below and get to see how much knowledge you have. All the best! see less

2. Catabolism is a process carried out in the lysosome

Explanation

Catabolism is a process that involves breaking down complex molecules into simpler ones to release energy. The lysosome is a cellular organelle responsible for the breakdown of various biomolecules. It contains enzymes that can break down proteins, lipids, carbohydrates, and nucleic acids. Therefore, catabolism does occur in the lysosome, making the statement "Catabolism is a process carried out in the lysosome" true.

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3. Covalent bonds are the result of equal sharing of electrons

Explanation

Covalent bonds occur when two atoms share electrons equally, resulting in a strong bond between them. This sharing of electrons allows both atoms to achieve a stable electron configuration, making the statement "Covalent bonds are the result of equal sharing of electrons" true. In covalent bonds, the electrons are not transferred from one atom to another, but rather shared between the atoms involved in the bond.

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4. Carbohydrates are composed of Carbon, Hydrogen, and Oxygen

Explanation

Carbohydrates are organic compounds that consist of carbon, hydrogen, and oxygen atoms in a ratio of 1:2:1, respectively. This composition forms the basic structure of all carbohydrates, including simple sugars, starches, and fibers. The presence of these three elements allows carbohydrates to serve as a major source of energy in living organisms. Therefore, the statement "Carbohydrates are composed of Carbon, Hydrogen, and Oxygen" is true.

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5. What is the basic unit of a protein?

Explanation

The basic unit of a protein is an amino acid. Proteins are composed of long chains of amino acids that are linked together by peptide bonds. Each amino acid consists of an amino group, a carboxyl group, and a unique side chain. These side chains determine the properties and function of the protein. Nucleic acids, fatty acids, lipids, and enzymes are not the basic units of proteins.

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6. The three parts to a cell is the plasma membrane, cytoplasm and organelles, and nucleus.

Explanation

The statement is true because a cell is composed of three main parts. The plasma membrane acts as a barrier, controlling the movement of substances in and out of the cell. The cytoplasm and organelles are located inside the plasma membrane and contain various cellular structures and molecules that carry out specific functions. The nucleus, often referred to as the control center of the cell, contains the genetic material and regulates cell activities. Therefore, the statement accurately describes the three parts of a cell.

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7. Cilia is found in the respiratory tract and the uterine tubes

Explanation

Cilia are indeed found in the respiratory tract and the uterine tubes. Cilia are tiny, hair-like structures that line the respiratory tract, helping to move mucus and trapped particles out of the lungs. In the uterine tubes, cilia play a role in moving the egg from the ovary to the uterus. Therefore, the statement that cilia are found in the respiratory tract and the uterine tubes is true.

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8. Carbohydrates are built when covalent bonds form between sugar monomers, releasing water

Explanation

Carbohydrates are indeed built when covalent bonds form between sugar monomers, a process known as dehydration synthesis. During this process, a water molecule is released as a byproduct. This is a fundamental concept in biochemistry, where monosaccharides (sugar monomers) join together through glycosidic linkages to form larger carbohydrates such as disaccharides and polysaccharides. Therefore, the statement is true.

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9. Gap Junctions are needed to achieve strong single heart contractions from cardiac cells

Explanation

Gap junctions are specialized protein channels that allow direct communication between adjacent cells. In the case of cardiac cells, these gap junctions play a crucial role in coordinating the electrical signals and contraction of the heart. They allow ions and small molecules to pass freely between cells, enabling the rapid spread of depolarization and ensuring synchronized contractions. Without gap junctions, the individual cardiac cells would not be able to communicate effectively, leading to weaker and less coordinated contractions. Therefore, the statement that gap junctions are needed to achieve strong single heart contractions from cardiac cells is true.

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10. Hydrocarbons are lipids, fats and oils, and are hydrophobic

Explanation

Hydrocarbons are organic compounds composed of only hydrogen and carbon atoms. Lipids, fats, and oils are examples of hydrocarbons as they consist mainly of carbon and hydrogen atoms. Additionally, hydrocarbons are known to be hydrophobic, meaning they do not mix or dissolve in water. Therefore, the statement that hydrocarbons are lipids, fats, and oils, and are hydrophobic is true.

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11. Transcribers are RNA polymerase and translaters are ribosomes and replication is done by DNA polymerase

Explanation

The given statement is true. Transcribers, also known as RNA polymerase, are responsible for transcribing or synthesizing RNA molecules from DNA templates during the process of transcription. Transcription occurs in the nucleus of eukaryotic cells and in the cytoplasm of prokaryotic cells. On the other hand, translaters, or ribosomes, are responsible for translating the mRNA molecules produced during transcription into proteins. Replication, the process of copying DNA, is indeed carried out by DNA polymerase.

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12. The most CO2 comes from this stage:

Explanation

The Krebs Cycle is the stage in cellular respiration where the majority of carbon dioxide (CO2) is produced. This cycle occurs in the mitochondria and is responsible for breaking down glucose and producing energy. During the Krebs Cycle, carbon atoms from glucose are released as CO2, which is then transported to the lungs for exhalation. This process generates a large amount of CO2 compared to the other stages of cellular respiration, making the Krebs Cycle the primary source of CO2 production.

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13. Inside the Golgi Body, what do you see occuring?

Explanation

Inside the Golgi Body, various processes occur. Proteins are sorted into different types for different destinations, meaning they are directed to specific locations within the cell. Proteins also undergo different types of modifications, such as the addition of sugar molecules or the cutting of certain sections. Finally, the Golgi Body is responsible for packaging proteins that are finished and ready for secretion out of the cell. Therefore, all of the given options are correct and accurately describe the events that occur inside the Golgi Body.

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14. Stage of protein production where the polypeptide chains form a 3-D structure:

Explanation

The tertiary stage of protein production is when the polypeptide chains fold and form a 3-D structure. This stage is crucial for the protein to acquire its functional shape and stability. The folding process involves interactions between different regions of the polypeptide chain, such as hydrogen bonding, disulfide bond formation, hydrophobic interactions, and electrostatic interactions. These interactions determine the final shape of the protein and allow it to carry out its specific biological function.

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15. Located in the cytoplasm and on the surface of the endoplasmic reticulum. It produces according to genetic information contained in mRNA. 

Explanation

Ribosomes are small structures found in the cytoplasm and on the surface of the endoplasmic reticulum. They play a crucial role in protein synthesis by translating the genetic information contained in mRNA (messenger RNA) into proteins. Ribosomes are responsible for assembling amino acids in the correct order to form proteins, which are essential for various cellular functions. Therefore, the given explanation describes the function and location of ribosomes accurately.

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16. Ions are typically elements one or two electrons in excess or shortage of a stable octet

Explanation

This statement is true because ions are formed when atoms gain or lose electrons to achieve a stable electron configuration, usually with eight electrons in the outermost energy level (known as an octet). Ions can either gain electrons to become negatively charged (anions) or lose electrons to become positively charged (cations). Therefore, ions typically have one or two electrons in excess or shortage of a stable octet.

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17. What makes up the sides of the the DNA ladder?

Explanation

The sides of the DNA ladder are made up of sugars (deoxyribose) and phosphates. These two components alternate to form the backbone of the DNA molecule. The sugars provide the structural support, while the phosphates help to stabilize the DNA structure by forming strong chemical bonds with the sugar molecules. Together, these sugars and phosphates create the double helix structure of DNA. Proteins and phospholipids are not involved in forming the sides of the DNA ladder.

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18. A covalent chemical bond is one in which atoms:

Explanation

A covalent chemical bond is formed when atoms share one or more electrons. In this type of bond, the electrons are not transferred from one atom to another, as in ionic bonds, but rather they are shared between the atoms. This sharing of electrons allows both atoms to achieve a more stable electron configuration, resulting in a strong bond between the atoms.

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19. Glucose:

Explanation

Glucose is a monosaccharide because it is a simple sugar that cannot be further broken down into smaller sugar units. Monosaccharides are the building blocks of carbohydrates and are composed of a single sugar molecule. They are the simplest form of carbohydrates and are easily absorbed by the body for energy.

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20. Smooth ER is found in striated muscle cells and liver cells

Explanation

Smooth ER is found in striated muscle cells and liver cells. This is true because smooth ER is responsible for various functions such as lipid metabolism, detoxification, and calcium storage. In striated muscle cells, smooth ER plays a role in regulating calcium levels and aiding in muscle contraction. In liver cells, smooth ER is involved in detoxifying drugs and toxins, as well as synthesizing lipids. Therefore, smooth ER is indeed present in both striated muscle cells and liver cells.

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21. Digest organelles and recycle of new proteins.

Explanation

Lysosomes are organelles responsible for digesting and recycling cellular waste, including old or damaged proteins. They contain enzymes that break down these molecules into smaller components, which can then be reused by the cell to build new proteins or generate energy. Lysosomes play a crucial role in maintaining cellular homeostasis and removing unwanted materials, making them essential for the overall functioning of the cell.

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22. What molecule is responsible for copying instructions from DNA and taking those instructions out to the cytoplasm of the cell?

Explanation

m-RNA, or messenger RNA, is responsible for copying instructions from DNA and taking those instructions out to the cytoplasm of the cell. It is synthesized during the process of transcription, where a section of DNA is transcribed into a complementary RNA molecule. This m-RNA molecule then carries the genetic information from the nucleus to the ribosomes in the cytoplasm, where it serves as a template for protein synthesis.

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23. Carcinoma is cancer of the epithelium

Explanation

Carcinoma refers to a type of cancer that originates in the epithelial cells, which are the cells that line the surfaces and cavities of the body. These cells form the outer layer of the skin, as well as the lining of organs, glands, and other structures. Therefore, it is correct to say that carcinoma is cancer of the epithelium.

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24. Which of the following subatomic particles is not found within the nucleus of the atom?

Explanation

Electrons are not found within the nucleus of the atom. Electrons are negatively charged subatomic particles that orbit the nucleus in specific energy levels or shells. The nucleus, on the other hand, contains protons and neutrons. Protons are positively charged particles, and neutrons have no charge. Therefore, the correct answer is electron.

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25. Proteins are:

Explanation

Proteins are macromolecules that are critically important for physiological processes. They play a vital role in various biological functions such as cell structure, enzymatic reactions, transportation of molecules, and immune responses. Proteins are composed of subunits called amino acids, which are linked together by polypeptide bonds. Therefore, the correct answer is A and D, as proteins are both critically important for physiological processes and are macromolecules with subunits linked by polypeptide bonds.

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26. Sugars are burned either aerobically or anaerobically here:

Explanation

Glycolysis is the first step in cellular respiration, where glucose is broken down into pyruvate. It can occur both aerobically (in the presence of oxygen) and anaerobically (in the absence of oxygen). In aerobic conditions, pyruvate is further oxidized in the Krebs Cycle and electron transport chain to produce ATP. In anaerobic conditions, pyruvate is converted into lactate or ethanol, yielding a small amount of ATP. Therefore, glycolysis can occur in both aerobic and anaerobic conditions, making it the correct answer.

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27. Negative ions are similar to positive ions in that they have an extra electron

Explanation

Negative ions are not similar to positive ions because negative ions have gained an extra electron, while positive ions have lost an electron. This extra electron gives negative ions a negative charge, whereas positive ions have a positive charge. Therefore, the statement is false.

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28. Elements are like ions in that they are not stable and therefore highly reactive

Explanation

Elements are like ions in that they are not stable and therefore highly reactive. This is because elements, like ions, have incomplete outer electron shells. In order to achieve stability, elements tend to gain, lose, or share electrons with other atoms, resulting in the formation of chemical bonds. This reactivity is what allows elements to participate in various chemical reactions and form compounds. Therefore, the statement that elements are not stable and highly reactive is true.

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29. Sites for energy production of cells. Contains own DNA, and can reproduce itself. 

Explanation

Mitochondria are the sites for energy production in cells. They contain their own DNA and are capable of reproducing themselves. They are responsible for converting nutrients into energy through a process called cellular respiration. This energy is then used by the cell to perform various functions and activities. Mitochondria are often referred to as the "powerhouses" of the cell due to their crucial role in energy production.

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30. What is non polar covalent bonds?

Explanation

Nonpolar covalent bonds occur when two identical atoms share electrons equally. In this type of bond, the electron density is evenly distributed between the two atoms, resulting in a balanced sharing of electrons. This means that neither atom has a stronger pull on the electrons, leading to a symmetrical distribution of charge. As a result, nonpolar covalent bonds do not have a partial positive or negative charge on either atom.

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31. The "sequence" stage of protein synthesis

Explanation

The "sequence" stage of protein synthesis refers to the primary structure of a protein. This structure is determined by the specific sequence of amino acids in the protein chain. The primary structure is essential as it dictates the protein's overall shape, function, and interactions with other molecules. It is the first level of protein structure and serves as a foundation for the subsequent stages of protein folding and assembly.

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32. Stacks of hollow, flattened sacs with cisternae. Modifies proteins and seperates according to destination and packages into vesicles. 

Explanation

The Golgi apparatus is responsible for modifying proteins and sorting them according to their destination. It consists of stacks of hollow, flattened sacs called cisternae. The Golgi apparatus also packages these modified proteins into vesicles for transport to their final destination. Lysosomes are responsible for breaking down waste materials, mitochondria are the powerhouses of the cell, and ribosomes are responsible for protein synthesis. Therefore, the correct answer is Golgi Apparatus.

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33. Which of the following are H20 soluble?

Explanation

Glucose and amino acids are H20 soluble because they are both polar molecules that can form hydrogen bonds with water molecules. Lipids, on the other hand, are nonpolar molecules and are therefore not soluble in water.

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34. Sucrose

Explanation

Sucrose is a disaccharide because it is composed of two monosaccharides, glucose and fructose, joined together by a glycosidic bond. Disaccharides are carbohydrates made up of two sugar units, while monosaccharides are single sugar units and polysaccharides are complex carbohydrates made up of many sugar units. Therefore, sucrose fits the definition of a disaccharide as it consists of two sugar units.

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35. Enzymes belong to which group of biological molecules?

Explanation

Enzymes belong to the group of biological molecules known as proteins. Proteins are large, complex molecules made up of amino acids. Enzymes are a specific type of protein that act as catalysts, speeding up chemical reactions in the body. They play a crucial role in various biological processes, such as digestion, metabolism, and cell signaling. Therefore, the correct answer is proteins.

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36. A nucleotide based molecule contains:

Explanation

The answer "All of the above" is correct because a nucleotide-based molecule contains all the mentioned components: a 5 carbon sugar, a phosphate group attached to one end of the sugar, and a nitrogenous base. These components are essential for the structure and function of nucleotides, which are the building blocks of nucleic acids like DNA and RNA.

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37. The most ATP comes from this stage:

Explanation

The electron transport chain is the stage in cellular respiration that produces the most ATP. During this process, electrons from NADH and FADH2 are passed along a series of protein complexes, generating a proton gradient across the inner mitochondrial membrane. This gradient is then used by ATP synthase to produce ATP. Compared to glycolysis and the Krebs cycle, which produce a smaller amount of ATP, the electron transport chain is the final step in respiration and is responsible for the majority of ATP production.

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38. Uses energy and proteins to move small molecules from one side of the membrane to the other. Often moves molecules from low concentration to higher concentration.

Explanation

Active transport is the correct answer because it involves the use of energy and proteins to move small molecules from one side of the membrane to the other. Unlike diffusion and osmosis, which rely on the movement of molecules from areas of high concentration to areas of low concentration, active transport moves molecules against their concentration gradient, often from low concentration to higher concentration. Filtration and dilation are not related to the movement of molecules across a membrane.

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39. Sugars and Carbohydrates:

Explanation

The correct answer is "Hydrophilic". Hydrophilic substances have an affinity for water and can easily dissolve in it. Sugars and carbohydrates, being hydrophilic, can form hydrogen bonds with water molecules, allowing them to dissolve and be transported in the bloodstream. This property is important for their role as a source of energy in the body.

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40. Small molecules such as oxygen and carbon dioxide and lipid soluble molecules such as steroids passing from high to low concentration.

Explanation

Simple diffusion is the process by which small molecules such as oxygen, carbon dioxide, and lipid soluble molecules passively move from an area of high concentration to an area of low concentration. This movement occurs without the need for any external energy or carrier proteins. Unlike facilitated diffusion, which requires the assistance of specific transport proteins, simple diffusion occurs directly through the lipid bilayer of the cell membrane. Filtration and dialysis involve different mechanisms and are not applicable to the given statement.

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41. Process of removing particles from an area of higher hydrostatic pressure to an area of lower hydrostatic pressure through holes or spaces but too small to permit solids or large particles to pass. 

Explanation

Filtration is the correct answer because it involves the process of removing particles from an area of higher hydrostatic pressure to an area of lower hydrostatic pressure through holes or spaces that are too small to permit solids or large particles to pass. This process is commonly used in various industries and scientific applications to separate solids from liquids or gases based on particle size.

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42. Secondary Active Transport:

Explanation

The correct answer is B and C. Secondary active transport uses co-transporters such as glucose and sodium, as well as the energy in an ion gradient to move a solute. This means that it relies on the concentration gradient of ions, such as sodium, to transport other molecules, like glucose, against their own concentration gradient. Additionally, it does not use the reduction energy of NADH to move protons across the inner mitochondrial membrane.

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43. Which of the following describe endergonic reactions?

Explanation

Endergonic reactions are chemical reactions that require an input of energy in order to proceed. These reactions are not spontaneous and do not release energy in the form of heat. Instead, they absorb energy from their surroundings. The use of ATP (adenosine triphosphate) as an energy source is characteristic of endergonic reactions, as ATP provides the necessary energy for cellular processes. Therefore, options A and D, which state that endergonic reactions use ATP and require an input of energy, accurately describe endergonic reactions.

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44. 6 carbon units enter this stage:

Explanation

Glycolysis is the correct answer because it is the initial stage of cellular respiration where glucose is broken down into two molecules of pyruvate, each containing three carbon units. This process occurs in the cytoplasm and does not require oxygen. The pyruvate molecules produced in glycolysis then enter the mitochondria to undergo further oxidation in the Krebs Cycle, where they are converted into acetyl CoA. Finally, the acetyl CoA molecules enter the Electron Transport Chain, which takes place in the inner mitochondrial membrane, to produce ATP through oxidative phosphorylation.

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45. What is the main component of the cell membrane?

Explanation

The main component of the cell membrane is phospholipids. Phospholipids are a type of lipid molecule that have a hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail. These molecules arrange themselves in a bilayer structure, with the hydrophilic heads facing the aqueous environment inside and outside the cell, and the hydrophobic tails facing each other in the middle. This arrangement forms a barrier that separates the cell's internal environment from the external environment, regulating the passage of molecules in and out of the cell.

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46. Ionic bonds are difficult to dissolve in water

Explanation

Ionic bonds are not difficult to dissolve in water. In fact, they are quite easy to dissolve in water. When an ionic compound is placed in water, the water molecules surround the ions, separating them from each other and causing the compound to dissolve. This process is known as hydration. The positive and negative charges of the ions are attracted to the polar water molecules, allowing the compound to break apart and dissolve. Therefore, the correct answer is False.

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47. Diffusion is a result of the kinetic energy in molecules

Explanation

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration. This movement is driven by the kinetic energy of the molecules, as they constantly move and collide with one another. The molecules with higher kinetic energy are more likely to move and spread out, leading to diffusion. Therefore, it is correct to say that diffusion is a result of the kinetic energy in molecules.

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48. Potassium with 19 protons, 19 electrons, and 20 neutrons

Explanation

The given information describes an isotope of potassium. An isotope is a variant of an element that has the same number of protons but a different number of neutrons. In this case, the number of protons (19) and electrons (19) matches the atomic number of potassium, but the number of neutrons (20) is different from the usual number of neutrons for potassium. Therefore, the correct answer is isotope.

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49. Homeostasis:

Explanation

The correct answer is "Depends upon the interaction of receptors, integrating centers, and effectors." This is because homeostasis, which refers to the maintenance of a stable internal environment, relies on the coordination and interaction of receptors (which detect changes in the environment), integrating centers (which process the information received from receptors), and effectors (which carry out the necessary responses to restore balance). Positive feedback is not primarily used in homeostasis, and acclimatization refers to the process of adjusting to the external environment, which is not the main mechanism involved in homeostasis.

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50. Oxidizing agents is a molecule or atom that accepts electrons or H+

Explanation

An oxidizing agent is a molecule or atom that accepts electrons or H+. This means that it has the ability to oxidize other substances by taking away their electrons or hydrogen atoms. This process is often associated with the gain of oxygen or the loss of hydrogen. Therefore, the statement "Oxidizing agents is a molecule or atom that accepts electrons or H+" is true.

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51. What is produced in Glycolysis?

Explanation

Glycolysis is the metabolic pathway that converts glucose into pyruvate. In this process, 2 molecules of pyruvate, 2 molecules of NADH, and 2 molecules of ATP are produced. Therefore, the correct answer is 2 Pyruvate, 2 NADH, 2 ATP.

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52. Each DNA strand has a backbone that consists of alternating:

Explanation

The correct answer is A and D. This is because the backbone of each DNA strand consists of alternating sugar and phosphate molecules, which are connected by covalent bonds. The nitrogen-containing bases are attached to the sugar molecules and are connected to each other by hydrogen bonds. Therefore, both A (covalent bonds) and D (sugar and phosphate molecules) are correct.

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53. The protein stage of production where weak hydrogen bonds form between hydrogen of one amino acid and the oxygen of a different amino acid nearby, and a helix/sheet forms.

Explanation

Secondary structure refers to the folding of a polypeptide chain into regular structures such as alpha helices or beta sheets. In this stage, weak hydrogen bonds are formed between the hydrogen of one amino acid and the oxygen of a different amino acid nearby, resulting in the formation of these regular structures. The secondary structure is important for determining the overall shape and stability of the protein.

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54. DNA replication takes place in the ____________ of the cell, and during the __________?

Explanation

During DNA replication, the process takes place in the nucleus of the cell. This is where the DNA is stored and where the replication machinery is located. The S phase refers to the synthesis phase of the cell cycle, during which DNA replication occurs. Therefore, the correct answer is "Nucleus, S phase."

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55. What is the overall reaction for aerobic respiration?

Explanation

The overall reaction for aerobic respiration involves the use of oxygen (O2) and glucose to produce carbon dioxide (CO2), water (H2O), and adenosine triphosphate (ATP). Additionally, pyruvic acid releases CO2 to enter the Krebs cycle. It is also true that there are 6 oxygen molecules for every sugar molecule involved in aerobic respiration. Therefore, the correct answer is "all of the above" as all the statements mentioned are true for the overall reaction of aerobic respiration.

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56. Which is not a correct description of glycolysis?

Explanation

Glycolysis is the metabolic pathway that breaks down glucose into pyruvic acid. It is a universal process that occurs in both aerobic and anaerobic conditions. Therefore, the statement that "it only occurs aerobically" is incorrect. Glycolysis takes place in the cytosol of the cell and involves a series of enzymatic reactions. It also results in the net synthesis of two molecules of ATP. Glucose is indeed the primary carbohydrate metabolized in glycolysis.

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57. H+ are moved , creating a concentration gradient that drives ATP synthesis here:

Explanation

In the electron transport chain, H+ ions are moved across the inner mitochondrial membrane, creating a concentration gradient. This gradient is used by ATP synthase to generate ATP through a process called oxidative phosphorylation. As the H+ ions flow back into the mitochondrial matrix through ATP synthase, the energy released is used to convert ADP to ATP. Therefore, the movement of H+ ions in the electron transport chain creates a concentration gradient that drives ATP synthesis.

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58. This mechanism activates protein kinase and phosphorlyzes enzymes and has huge signal amplification responses, Large output of messengers to create products from kinase activating enzymes:

Explanation

cAMP (cyclic adenosine monophosphate) is a secondary messenger that plays a crucial role in signal transduction pathways. It is synthesized from ATP by the enzyme adenylate cyclase, which is activated by protein kinase. Once cAMP is produced, it can bind to and activate protein kinase A (PKA), leading to the phosphorylation of various enzymes and proteins. This phosphorylation cascade amplifies the initial signal, resulting in a large output of messengers and the activation of downstream processes. Therefore, cAMP is a key player in signal amplification and the generation of products from kinase activating enzymes.

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59. WHere does Krebs cycle take place?

Explanation

The Krebs cycle, also known as the citric acid cycle or the tricarboxylic acid cycle, takes place in the mitochondrial matrix. This is the innermost compartment of the mitochondria, where several enzymatic reactions occur to generate energy in the form of ATP. The cycle involves the oxidation of acetyl-CoA and the production of NADH and FADH2, which are important molecules in cellular respiration. The mitochondrial matrix provides an ideal environment for these reactions to occur, with the necessary enzymes and coenzymes present.

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60. Phospholipids form effective barriers between aqueous cytosol of cells and the aqueous extracellular fluid because they are?

Explanation

Phospholipids form effective barriers between aqueous cytosol of cells and the aqueous extracellular fluid because they are both polar and nonpolar. The polar head of the phospholipid molecule is hydrophilic, meaning it attracts water molecules, while the nonpolar tails are hydrophobic, repelling water. This dual nature allows phospholipids to arrange themselves in a bilayer, with the hydrophilic heads facing the water on both sides and the hydrophobic tails in the middle. This structure creates a barrier that prevents water and other polar molecules from freely crossing the cell membrane, maintaining the separation between the cytosol and extracellular fluid.

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61. What is the nuclear material?

Explanation

Chromatin is the correct answer because it refers to the material that makes up the chromosomes in the nucleus of a cell. It consists of DNA, RNA, and proteins, and is responsible for packaging and organizing the genetic material in the nucleus. Chromosomes, chromatids, and centromeres are all components of chromatin, but chromatin itself encompasses all of these structures. None of the other options are correct because they do not specifically refer to the nuclear material.

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62. Where does Glycolysis take place?

Explanation

Glycolysis is the metabolic pathway that breaks down glucose into pyruvate. It is the first step in cellular respiration and occurs in the cytosol of the cell. The cytosol is the fluid portion of the cytoplasm, where many metabolic processes take place. This is where the enzymes involved in glycolysis are located and where glucose is converted into pyruvate through a series of chemical reactions. Therefore, the correct answer is the cytosol of the cell.

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63. What types of things would you find inside a lysosome?

Explanation

Inside a lysosome, you would find old membranes and proteins being broken down to recycle, incoming food being digested into smaller parts that the other organelles could accept, and wastes pooled together for exocytosis. Therefore, the correct answer is "All of the above."

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64. Protein-mediated transport:

Explanation

Protein-mediated transport refers to the process of transporting molecules across a cell membrane with the help of specific proteins. In this case, the correct answer is Sodium or Potassium ions. This means that proteins in the cell membrane are responsible for transporting Sodium or Potassium ions across the membrane. These ions are crucial for various cellular processes such as maintaining the cell's electrical potential and regulating water balance.

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65. Electrons are electrically neutral

Explanation

Electrons are electrically neutral because they have a negative charge that is equal in magnitude to the positive charge of a proton. This means that the total charge of an electron is zero, making it electrically neutral.

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66. This process generates two cells with 46 chromosomes

Explanation

Mitosis is the correct answer because it is the process of cell division that results in the formation of two identical daughter cells, each with the same number of chromosomes as the parent cell. In mitosis, the parent cell's chromosomes are replicated and divided equally between the two daughter cells, resulting in each daughter cell having the same number of chromosomes as the parent cell. Therefore, this process generates two cells with 46 chromosomes. Meiosis I and Meiosis II involve two rounds of cell division, resulting in the formation of four daughter cells with half the number of chromosomes as the parent cell.

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67. Calcium with 20 protons and 18 electrons and 20 neutrons:

Explanation

An ion is an atom that has gained or lost electrons, resulting in a net positive or negative charge. In this case, calcium with 20 protons and 18 electrons would have a +2 charge, indicating that it has lost 2 electrons. Therefore, the correct answer is ion.

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68. Chlorine with 17 protons and 17 neutrons and 17 electrons

Explanation

The given information describes the composition of an atom of chlorine, which has 17 protons, 17 neutrons, and 17 electrons. Therefore, the correct answer is "Atom represented," as it accurately represents the structure of a chlorine atom. An ion would have a different number of electrons, while an isotope would have a different number of neutrons. "None of the above" is incorrect because the given information does represent an atom.

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69. You need to decide what type of antibiotic to give a patient, who has an infection. To do this, you need to know if the pathogen that has been infected them is prokaryotic or eukaryotic. What do you look for under the microscope?

Explanation

To determine whether the pathogen is prokaryotic or eukaryotic, you would look for the presence or absence of a nuclear membrane under the microscope. Prokaryotes do not have a nuclear membrane, while eukaryotes do. This is a key characteristic that helps differentiate between the two types of organisms.

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70. What is the end product of Kreb's cycle?

Explanation

The end product of Kreb's cycle is CO2. Kreb's cycle, also known as the citric acid cycle, is a series of chemical reactions that occur in the mitochondria of cells. It is an important part of cellular respiration, where glucose is broken down to produce energy. During the cycle, CO2 is released as a waste product. This CO2 is then transported to the lungs where it is exhaled out of the body.

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71. Identify the phase of mitosis which is correctly paired with its characteristics:

Explanation

During prophase, the nuclear membrane disintegrates. This is the first phase of mitosis, where the chromatin condenses into visible chromosomes, and the spindle apparatus begins to form. The disintegration of the nuclear membrane allows the chromosomes to become more accessible for the subsequent steps of mitosis. It also allows the spindle fibers to interact with the chromosomes and move them during later stages of mitosis.

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72. Atoms do not carry a charge

Explanation

Atoms are composed of protons, neutrons, and electrons. Protons carry a positive charge, electrons carry a negative charge, and neutrons have no charge. In an atom, the number of protons is equal to the number of electrons, resulting in a neutral charge overall. Therefore, atoms do not carry a charge, making the statement "Atoms do not carry a charge" true.

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73. Which molecular process takes place in the Cytoplasm?

Explanation

Translation is the molecular process that takes place in the cytoplasm. It is the process by which the genetic information encoded in mRNA is used to synthesize proteins. During translation, ribosomes in the cytoplasm read the mRNA sequence and assemble amino acids into a polypeptide chain, which ultimately forms a protein. Replication, on the other hand, occurs in the nucleus and is the process of copying DNA to produce an identical DNA molecule. Transcription also occurs in the nucleus and is the process of synthesizing mRNA from a DNA template. Therefore, the correct answer is "Translation only" as it is the only molecular process that occurs in the cytoplasm.

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74. Equally distributed electrons between two atoms

Explanation

In a non polar covalent bond, the electrons are equally distributed between two atoms. This means that the atoms have similar electronegativity, resulting in a balanced sharing of electrons. As a result, there is no significant charge separation, and the molecule is electrically neutral. Therefore, the given answer "non polar covalent" is correct.

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75. Cells containing two homologous copies from each parent:

Explanation

Diploid refers to cells that contain two homologous copies of each chromosome, one from each parent. This means that the cell has a complete set of chromosomes. In contrast, haploid cells only have one copy of each chromosome, while a zygote is a fertilized egg that contains the complete set of chromosomes from both parents. Homologous chromosomes are pairs of chromosomes that contain similar genes, one from each parent, and are involved in genetic recombination during meiosis.

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76. What mechanism changes shape to bring inside of cell pathway?

Explanation

Carrier proteins are a type of transport protein that play a crucial role in facilitating the movement of molecules across the cell membrane. These proteins undergo conformational changes in their shape to bind to specific molecules on one side of the membrane and then release them on the other side. This shape change allows the carrier protein to bring the molecules inside the cell through a pathway. Therefore, carrier proteins are the mechanism that changes shape to bring the inside of the cell pathway.

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77. What is the end product of the Electron Transport Chain?

Explanation

The end product of the Electron Transport Chain is water (H2O) and ATP. During the Electron Transport Chain, electrons are transferred through a series of protein complexes, which generate a gradient that drives the production of ATP. At the end of the chain, the electrons combine with oxygen to form water. Therefore, option B (H2O) and option D (ATP) are both correct answers.

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78. Diffusion without protein mediation:

Explanation

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration. It can occur with or without protein mediation. In this case, the correct answer is "Oxygen and water" because these molecules are small and nonpolar, allowing them to diffuse freely across the cell membrane without the need for protein channels or carriers. Sodium or potassium ions and complex molecules like fatty acids require protein mediation for diffusion to occur.

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79. Endocytosis/Phagocytosis:

Explanation

Endocytosis and phagocytosis are processes by which cells engulf and internalize substances from their external environment. These processes are used to take in complex molecules such as fatty acids, among other substances. Therefore, the correct answer is complex molecules (fatty acids).

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80. Shivering is a response to a cold draft is an example of:

Explanation

Shivering is a response to a cold draft, which is a mechanism to maintain homeostasis by regulating body temperature. It is also an example of negative feedback, as shivering helps to increase body heat production in response to a drop in temperature. Therefore, the correct answer is A and B.

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81. What element makes up most of atoms in the body?

Explanation

Hydrogen is the element that makes up most of the atoms in the body. It is the most abundant element in the universe and plays a crucial role in the structure and function of biological molecules. Hydrogen is a component of water, which makes up a significant portion of the human body. It is also present in organic compounds such as carbohydrates, lipids, and proteins, which are essential for life processes. Therefore, hydrogen is the correct answer as it is the most prevalent element in the body.

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82. Lipids:

Explanation

The correct answer is A and C. Lipids are hydrophobic, meaning they repel water. This is because lipids are made up of long hydrocarbon chains, which are nonpolar and do not mix well with water. Additionally, lipids have neutral covalent bonds, which means that they do not have a positive or negative charge. This further contributes to their hydrophobic nature.

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83. One of two identical copies of DNA joined at their cenromeres. 

Explanation

A chromatid refers to one of the two identical copies of DNA that are joined together at the centromere. During cell division, each chromatid separates and becomes an individual chromosome. Therefore, the correct answer is chromatid.

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84. Ionic bonds result from the sharing of electrons in a pair to complete an octet

Explanation

Ionic bonds actually result from the transfer of electrons, not the sharing of electrons. In an ionic bond, one atom donates electrons to another atom in order to achieve a stable electron configuration. This transfer of electrons creates charged ions that are attracted to each other, forming the ionic bond. Therefore, the statement that ionic bonds result from the sharing of electrons is incorrect.

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85. What types of tissues contain gap junctions?

Explanation

Gap junctions are specialized protein channels that allow direct communication and exchange of small molecules between adjacent cells. They are found in tissues that require coordinated electrical and chemical signaling, such as the myocardium (heart muscle). Gap junctions play a crucial role in synchronizing the contraction of cardiac muscle cells, allowing the heart to function as a coordinated unit. Therefore, the correct answer is Myocardium.

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86. Uses a concentration differences to move small molecules from one side of the membrane to the other. SOme types require protein transporters, some do not. No energy is required. 

Explanation

Diffusion is the correct answer because it involves the movement of small molecules from an area of high concentration to an area of low concentration, utilizing the concentration differences. It does not require energy and can occur without the need for protein transporters. Endocytosis/Phagocytosis involves the engulfing of large particles or molecules by the cell membrane, which is not mentioned in the given explanation. Active transport, on the other hand, requires energy to move molecules against their concentration gradient, which is not mentioned in the explanation either. Therefore, the correct answer is diffusion.

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87. This process generates cells with 23 chromosomes

Explanation

The correct answer is B and C because both Meiosis I and Meiosis II generate cells with 23 chromosomes. In Meiosis I, the cell undergoes homologous chromosome pairing and crossing over, resulting in two daughter cells with half the number of chromosomes. Then, in Meiosis II, these daughter cells undergo further division, resulting in four cells, each with 23 chromosomes.

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88. Which describes the process of transcription:

Explanation

The correct answer is B and C. Transcription is the process of transferring genetic information from DNA to RNA. It occurs in the cell nucleus. This process involves the synthesis of RNA molecules using a DNA template. The DNA strand is used as a template to create a complementary RNA molecule, resulting in the transfer of genetic information. Transcription is an essential step in gene expression and allows for the production of different types of RNA molecules, including messenger RNA (mRNA) which is involved in protein synthesis.

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89. A highly organized structure with microtubules and microfilaments that function as the cytoskeleton

Explanation

The cytoplasm is a highly organized structure within the cell that contains various components such as the cytoskeleton, which is made up of microtubules and microfilaments. These structures provide support and shape to the cell, allowing it to maintain its integrity. Additionally, the cytoplasm is the site of many cellular processes, including metabolism and protein synthesis. Therefore, the cytoplasm is the correct answer as it encompasses the highly organized structure with microtubules and microfilaments that function as the cytoskeleton.

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90. Which of the following is not true of hydrogen bonds?

Explanation

Hydrogen bonds form between one polar and one nonpolar molecule. Hydrogen bonds are weak compared to covalent and ionic bonds, easily broken by raising temperature, and important in molecular interactions and contribute to the overall shape of large molecules.

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91. The cAMP system rapidly amplifies the response capacity of cells, and important second messengers such as:

Explanation

The cAMP system is a signaling pathway that plays a crucial role in amplifying cellular responses. Calcium is an important second messenger involved in various cellular processes such as muscle contraction, neurotransmitter release, and gene expression. It acts as a key regulator in the cAMP system, helping to transmit signals and activate downstream effectors. Therefore, the presence of calcium as an important second messenger in the cAMP system supports the rapid amplification of cellular response capacity.

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92. Molecules that are reduced lose electrons or H+

Explanation

Molecules that are reduced gain electrons or H+ ions. This is because reduction involves the addition of electrons or hydrogen ions to a molecule, resulting in a decrease in its oxidation state. Therefore, the statement "Molecules that are reduced lose electrons or H+" is incorrect.

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93. What are types of things you find inside a vesicle?

Explanation

Inside a vesicle, wastes are pooled together for exocytosis. Exocytosis is the process by which cells release waste materials or other substances to the external environment. Vesicles act as small storage compartments within cells, and they can contain various substances such as waste products that need to be eliminated from the cell. These waste materials are gathered and stored in vesicles until they are ready to be transported and released outside the cell through exocytosis. Therefore, the correct answer is "Wastes pooled together for exocytosis."

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94. This process pairs chromosomes you received from each parent

Explanation

Meiosis I is the correct answer because it is the process that pairs chromosomes received from each parent. During Meiosis I, homologous chromosomes pair up and exchange genetic material through a process called crossing over. This ensures genetic diversity by shuffling the genetic information from both parents. Meiosis II, on the other hand, is the second division in meiosis where the sister chromatids separate, resulting in the formation of four haploid cells.

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95. What is responsible for the storage, expression, and transmission of genetic information?

Explanation

Nucleic acids are responsible for the storage, expression, and transmission of genetic information. DNA and RNA, which are types of nucleic acids, carry the genetic instructions that determine the traits and characteristics of living organisms. These nucleic acids store genetic information in the form of a code, which is then expressed and used to produce proteins and other molecules necessary for the functioning of cells. Nucleic acids also play a crucial role in the transmission of genetic information from one generation to the next through processes like replication and transcription.

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96. Phagocytosis and Pinocytosis are components of Exocytosis

Explanation

Exocytosis is a process by which cells release substances outside the cell through vesicles fusing with the cell membrane. Phagocytosis and Pinocytosis, on the other hand, are both forms of endocytosis, which involve the uptake of substances into the cell. Therefore, they are not components of exocytosis.

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97. What is the chemical nature of Hydrophobic receptors?

Explanation

Hydrophobic receptors are capable of binding with nuclear receptors and with DNA to turn signals on or off in transcription. They also have the ability to change gene expression with slow and sustained responses. Therefore, the correct answer is A and B.

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98. Which of the following is not a characteristic of Lipid Soluble Messengers?

Explanation

Lipid soluble messengers are known for their slower, longer-lasting changes rather than more drastic, shorter, abrupt changes. This is because lipid soluble messengers, such as steroid hormones, can easily pass through cell membranes and bind to specific receptors in the cytoplasm or nucleus. Once bound, they can alter gene expression and protein synthesis, leading to gradual and sustained effects on cellular processes. In contrast, water-soluble messengers, like peptide hormones, typically act through cell surface receptors and trigger rapid and transient signaling events, resulting in more immediate but short-lived changes. Therefore, the statement "More drastic, shorter, abrupt changes" does not align with the characteristics of lipid soluble messengers.

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99. Which of the following are not used in protein synthesis

Explanation

Thymine is not used in protein synthesis because it is one of the four nitrogenous bases found in DNA, not RNA. In protein synthesis, the genetic information from DNA is transcribed into RNA, specifically messenger RNA (mRNA), which carries the instructions for protein synthesis. RNA contains the nitrogenous base uracil instead of thymine. Therefore, thymine is not involved in the process of protein synthesis.

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100. Where does translation occur?

Explanation

Translation occurs in the cytoplasm at a ribosome. During translation, the genetic information in mRNA is decoded to synthesize proteins. This process takes place in the cytoplasm, specifically at the ribosomes, which are the cellular structures responsible for protein synthesis. The nucleus, on the other hand, is where transcription occurs, which is the process of synthesizing mRNA from DNA. Therefore, the correct answer is cytosol at a ribosome.

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101. Unsaturated fatty acids:

Explanation

Unsaturated fatty acids contain one or more double bonds. This means that they do not contain the maximum number of electrons. Therefore, the correct answer is B and C.

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102. Stage of protein production where polypeptide chains covalently link together

Explanation

The quaternary structure of a protein refers to the stage where multiple polypeptide chains come together and interact with each other to form a functional protein. This structure is held together by covalent bonds, such as disulfide bonds, and non-covalent interactions, such as hydrogen bonds and hydrophobic interactions. The quaternary structure is crucial for the protein's overall stability and function. The primary, secondary, and tertiary structures refer to earlier stages in protein production, where the polypeptide chain is formed, folded into regular patterns, and further folded into its three-dimensional structure, respectively.

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103. Four of the five answers below are related by a common phase of mitosis. Find the EXCEPTION that does not apply to the same stage of mitosis.

Explanation

The division of the centromere is not related to a specific phase of mitosis. The centromere is the region of a chromosome where the sister chromatids are held together before they separate during anaphase. The division of the centromere occurs during anaphase, which is the stage of mitosis when the sister chromatids are pulled apart to opposite ends of the cell. Therefore, the division of the centromere does not belong to the same stage of mitosis as the other options provided.

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104. What molecular process takes place in the Nucleus?

Explanation

Transcription is the process by which genetic information in DNA is copied into a complementary RNA molecule. This process occurs in the nucleus of eukaryotic cells, where DNA is located. During transcription, RNA polymerase enzyme binds to a specific region of DNA called the promoter and synthesizes a strand of RNA that is complementary to the DNA template strand. This RNA molecule, known as messenger RNA (mRNA), carries the genetic information from the nucleus to the cytoplasm, where it is then translated into a protein through the process of translation. Therefore, the correct answer is transcription only.

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105. This process generates two cells that are alike

Explanation

Mitosis is a cell division process where a single cell divides into two identical daughter cells. It is a form of asexual reproduction and occurs in somatic cells for growth and repair. Meiosis, on the other hand, is a cell division process that occurs in reproductive cells (gametes) and results in the formation of four non-identical daughter cells. Therefore, the correct answer is A and C, as both Mitosis and Meiosis II generate two cells that are alike.

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106. Carries half the genetic information of an individual:

Explanation

A zygote is formed when two gametes (sperm and egg) fuse during fertilization. It is the initial cell that contains the complete set of genetic information from both parents. Therefore, it carries half of the genetic information of an individual, as it combines the genetic material from both the mother and the father.

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107. Hydrolysis is the removal of water to break down a covalent bond between two compounds

Explanation

Hydrolysis is actually the opposite process - it involves the addition of water to break down a covalent bond between two compounds. This reaction is commonly used in digestion, where water is added to break down complex molecules into simpler ones. Therefore, the correct answer is False.

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Channel proteins move transport ions through concentration gradient
Catabolism is a process carried out in the lysosome
Covalent bonds are the result of equal sharing of electrons
Carbohydrates are composed of Carbon, Hydrogen, and Oxygen
What is the basic unit of a protein?
The three parts to a cell is the plasma membrane, cytoplasm and...
Cilia is found in the respiratory tract and the uterine tubes
Carbohydrates are built when covalent bonds form between sugar...
Gap Junctions are needed to achieve strong single heart contractions...
Hydrocarbons are lipids, fats and oils, and are hydrophobic
Transcribers are RNA polymerase and translaters are ribosomes and...
The most CO2 comes from this stage:
Inside the Golgi Body, what do you see occuring?
Stage of protein production where the polypeptide chains form a 3-D...
Located in the cytoplasm and on the surface of the endoplasmic...
Ions are typically elements one or two electrons in excess or shortage...
What makes up the sides of the the DNA ladder?
A covalent chemical bond is one in which atoms:
Glucose:
Smooth ER is found in striated muscle cells and liver cells
Digest organelles and recycle of new proteins.
What molecule is responsible for copying instructions from DNA and...
Carcinoma is cancer of the epithelium
Which of the following subatomic particles is not found within the...
Proteins are:
Sugars are burned either aerobically or anaerobically here:
Negative ions are similar to positive ions in that they have an extra...
Elements are like ions in that they are not stable and therefore...
Sites for energy production of cells. Contains own DNA, and can...
What is non polar covalent bonds?
The "sequence" stage of protein synthesis
Stacks of hollow, flattened sacs with cisternae. Modifies proteins and...
Which of the following are H20 soluble?
Sucrose
Enzymes belong to which group of biological molecules?
A nucleotide based molecule contains:
The most ATP comes from this stage:
Uses energy and proteins to move small molecules from one side of the...
Sugars and Carbohydrates:
Small molecules such as oxygen and carbon dioxide and lipid soluble...
Process of removing particles from an area of higher hydrostatic...
Secondary Active Transport:
Which of the following describe endergonic reactions?
6 carbon units enter this stage:
What is the main component of the cell membrane?
Ionic bonds are difficult to dissolve in water
Diffusion is a result of the kinetic energy in molecules
Potassium with 19 protons, 19 electrons, and 20 neutrons
Homeostasis:
Oxidizing agents is a molecule or atom that accepts electrons or H+
What is produced in Glycolysis?
Each DNA strand has a backbone that consists of alternating:
The protein stage of production where weak hydrogen bonds form between...
DNA replication takes place in the ____________ of the cell, and...
What is the overall reaction for aerobic respiration?
Which is not a correct description of glycolysis?
H+ are moved , creating a concentration gradient that drives ATP...
This mechanism activates protein kinase and phosphorlyzes enzymes and...
WHere does Krebs cycle take place?
Phospholipids form effective barriers between aqueous cytosol of cells...
What is the nuclear material?
Where does Glycolysis take place?
What types of things would you find inside a lysosome?
Protein-mediated transport:
Electrons are electrically neutral
This process generates two cells with 46 chromosomes
Calcium with 20 protons and 18 electrons and 20 neutrons:
Chlorine with 17 protons and 17 neutrons and 17 electrons
You need to decide what type of antibiotic to give a patient, who has...
What is the end product of Kreb's cycle?
Identify the phase of mitosis which is correctly paired with its...
Atoms do not carry a charge
Which molecular process takes place in the Cytoplasm?
Equally distributed electrons between two atoms
Cells containing two homologous copies from each parent:
What mechanism changes shape to bring inside of cell pathway?
What is the end product of the Electron Transport Chain?
Diffusion without protein mediation:
Endocytosis/Phagocytosis:
Shivering is a response to a cold draft is an example of:
What element makes up most of atoms in the body?
Lipids:
One of two identical copies of DNA joined at their cenromeres. 
Ionic bonds result from the sharing of electrons in a pair to complete...
What types of tissues contain gap junctions?
Uses a concentration differences to move small molecules from one side...
This process generates cells with 23 chromosomes
Which describes the process of transcription:
A highly organized structure with microtubules and microfilaments that...
Which of the following is not true of hydrogen bonds?
The cAMP system rapidly amplifies the response capacity of cells, and...
Molecules that are reduced lose electrons or H+
What are types of things you find inside a vesicle?
This process pairs chromosomes you received from each parent
What is responsible for the storage, expression, and transmission of...
Phagocytosis and Pinocytosis are components of Exocytosis
What is the chemical nature of Hydrophobic receptors?
Which of the following is not a characteristic of Lipid Soluble...
Which of the following are not used in protein synthesis
Where does translation occur?
Unsaturated fatty acids:
Stage of protein production where polypeptide chains covalently link...
Four of the five answers below are related by a common phase of...
What molecular process takes place in the Nucleus?
This process generates two cells that are alike
Carries half the genetic information of an individual:
Hydrolysis is the removal of water to break down a covalent bond...
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