Microbiology, Bacterial Metabolism

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  • 1/77 Questions

    Can E. Coli biosythesize on its own?

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Microbiology Quizzes & Trivia
About This Quiz

Explore the fundamentals of bacterial metabolism in this focused quiz. Cover key concepts like cellular chemistry, nutrient uptake, catabolism, anabolism, and polymerization. Essential for students of microbiology and biochemistry, enhancing understanding of microbial growth and metabolic processes.

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  • 2. 

    Regulation, the pathways much work in concert at all times, needs vary with enviornment, efficiency the cell must only take what it needs.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement suggests that regulation is necessary for the pathways in a cell to work together effectively. It also implies that the needs of the cell can vary depending on the environment, and the cell must only take what it requires for efficiency. Therefore, the answer "True" is correct as it aligns with the given explanation.

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  • 3. 

    What uses light energy

    • Autotroph

    • Phototroph

    • Chemotroph

    Correct Answer
    A. Phototroph
    Explanation
    Phototrophs are organisms that use light energy to carry out photosynthesis, a process in which they convert sunlight into chemical energy. These organisms have specialized pigments, such as chlorophyll, that absorb light and use it to produce glucose and oxygen. This glucose serves as a source of energy for the organism, while the oxygen is released into the environment. Examples of phototrophs include plants, algae, and some bacteria. They are able to harness the energy from light and convert it into usable energy, making them dependent on light as a source of energy.

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  • 4. 

    Chemiosmosis is dependent on proton gradient

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Chemiosmosis is a process in which the movement of protons across a membrane is coupled with the synthesis of ATP. This process occurs in the mitochondria during cellular respiration and in the chloroplasts during photosynthesis. The proton gradient, created by the pumping of protons across the membrane, is essential for the production of ATP through the enzyme ATP synthase. Therefore, chemiosmosis is indeed dependent on a proton gradient.

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  • 5. 

    What uses energy from chemicals?

    • Chemotroph

    • Heterotroph

    • Autotroph

    Correct Answer
    A. Chemotroph
    Explanation
    Chemotrophs are organisms that obtain energy by breaking down chemical compounds. They are able to harness the energy stored in these chemicals and use it for their metabolic processes. This is in contrast to autotrophs, which obtain energy from sunlight, and heterotrophs, which obtain energy by consuming organic matter. Chemotrophs can be found in various environments, such as deep-sea hydrothermal vents, where they utilize chemicals like hydrogen sulfide or methane to produce energy.

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  • 6. 

    Any spoilage of food by microorganisms, Any process that produces alcoholic beverages or acidic dairy products, and any large scale microbial process occuring with or withouth air.

    Correct Answer
    Fermentation
    Explanation
    Fermentation refers to any process that involves the breakdown of organic substances by microorganisms, typically in the absence of oxygen. This can result in the spoilage of food by microorganisms, the production of alcoholic beverages or acidic dairy products, and the occurrence of large-scale microbial processes. Fermentation is a natural and common process used in various industries, such as brewing, winemaking, and food preservation. It is characterized by the conversion of sugars into alcohol, acids, or gases by the action of yeasts, bacteria, or other microorganisms.

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  • 7. 

    What is the major nutrient in Carb Catabolism?

    • Lipid

    • Glucose

    • Sacrose

    Correct Answer
    A. Glucose
    Explanation
    Glucose is the major nutrient in carbohydrate catabolism because it is the primary source of energy for the body. During catabolism, carbohydrates are broken down into glucose molecules, which are then used by cells to produce ATP (adenosine triphosphate), the energy currency of the body. Glucose can be easily metabolized by cells and is an efficient fuel source. Lipids and sucrose can also be used as energy sources, but glucose is the preferred nutrient for carbohydrate catabolism.

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  • 8. 

    Each bacterial species has an optimal temperature.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Each bacterial species has an optimal temperature refers to the fact that different bacterial species thrive best at specific temperature ranges. This is because temperature affects their metabolic processes and overall growth. Bacteria have adapted to survive and reproduce within certain temperature limits, and deviations from their optimal temperature can hinder their growth or even lead to their death. Therefore, it is true that each bacterial species has an optimal temperature.

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  • 9. 

    Oxidation = gain of electrons

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Reduction = gain of electrons

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  • 10. 

    Fermentation requires oxygen.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Fermentation does not require oxygen. It is an anaerobic process that occurs in the absence of oxygen. During fermentation, microorganisms such as yeast or bacteria convert sugars into alcohol or acids without the need for oxygen. This process is commonly used in the production of alcoholic beverages, bread, and yogurt.

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  • 11. 

    All bichemical reactions in a cell = catabolism.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    It equals metabolism.

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  • 12. 

    NAD/NAD(P) + H + = NADpH This drives steps in these pathways

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement "NAD/NAD(P) + H + = NADPH" is true. NAD and NADP are coenzymes involved in various metabolic pathways, and they can accept and donate electrons in the form of hydride ions (H+). In this reaction, NAD or NADP accepts a hydride ion and gets reduced to NADPH. NADPH is an important molecule in cellular metabolism and serves as a reducing agent in many biosynthetic reactions. Therefore, this reaction drives steps in metabolic pathways, making the given statement true.

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  • 13. 

    Aerobic respiration is the final electron receptor in the ETC in molecular oxygen

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Aerobic respiration is the process by which cells use oxygen to produce energy. In this process, the final electron acceptor in the electron transport chain (ETC) is molecular oxygen. Oxygen accepts the electrons and combines with hydrogen ions to form water. This is an essential step in the production of ATP, the energy currency of the cell. Therefore, the statement that aerobic respiration is the final electron receptor in the ETC in molecular oxygen is true.

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  • 14. 

    Transferase

    • Rearrangement of atoms

    • Hydrolysis

    • Transfer functional groups

    Correct Answer
    A. Transfer functional groups
    Explanation
    Transferase enzymes are a class of enzymes that facilitate the transfer of functional groups from one molecule to another. This transfer of functional groups can involve various chemical reactions, such as rearrangement of atoms or hydrolysis. Therefore, the answer "transfer functional groups" accurately describes the main function of transferase enzymes.

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  • 15. 

    1/5 E.coli enzymes used in biosynthesis

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement is true because E.coli enzymes are indeed used in biosynthesis. E.coli, a type of bacteria, has enzymes that play a crucial role in various biochemical reactions involved in the production of essential molecules and compounds within living organisms. These enzymes are often used in biotechnology and industrial processes to produce a wide range of products, including pharmaceuticals, biofuels, and chemicals. Their ability to efficiently catalyze specific reactions makes them valuable tools in biosynthesis.

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  • 16. 

    Catabolism provide what for anabolism?

    • Building blocks and enzymes

    • Enzymes and protien synthesis

    • Building blocks and energy

    Correct Answer
    A. Building blocks and energy
    Explanation
    Catabolism provides building blocks and energy for anabolism. During catabolic reactions, complex molecules are broken down into simpler ones, releasing energy. This energy is then used in anabolic reactions, where simpler molecules are combined to form complex ones. Additionally, catabolism also generates building blocks, such as amino acids and nucleotides, which are essential for the synthesis of proteins, DNA, and other macromolecules during anabolism.

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  • 17. 

    What does not uses the Krebs cycle or ETC

    Correct Answer
    Fermentation
    Explanation
    Fermentation does not use the Krebs cycle or ETC (Electron Transport Chain). Instead, it is an anaerobic process that occurs in the absence of oxygen. During fermentation, glucose is converted into simpler molecules such as lactic acid or ethanol, producing a small amount of ATP. This process is commonly used by microorganisms like yeast and bacteria to generate energy when oxygen is not available. Unlike aerobic respiration, which relies on the Krebs cycle and ETC to produce a large amount of ATP, fermentation is a less efficient energy production pathway.

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  • 18. 

    What provides energy and building blocks for anabolism?

    • Catabolism

    • Metabolism

    • Breaking down of enzymes

    Correct Answer
    A. Catabolism
    Explanation
    Catabolism is the process of breaking down complex molecules into simpler ones, releasing energy in the process. This energy can be utilized by anabolism, which is the process of building complex molecules from simpler ones. Therefore, catabolism provides both the energy and the building blocks required for anabolism. Metabolism refers to the overall chemical reactions in the body, which includes both catabolism and anabolism. Breaking down of enzymes is not directly related to providing energy and building blocks for anabolism.

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  • 19. 

    Polymerase

    • Transfer functional groups

    • Sythesized nucleic acids

    • Hydrolysis

    Correct Answer
    A. Sythesized nucleic acids
    Explanation
    Polymerase is an enzyme that is responsible for synthesizing nucleic acids. It catalyzes the formation of phosphodiester bonds between nucleotides, leading to the synthesis of DNA or RNA molecules. The enzyme transfers functional groups, such as phosphate groups, from nucleotides to the growing nucleic acid chain. This process involves the hydrolysis of high-energy phosphate bonds, providing the necessary energy for nucleotide polymerization. Therefore, the correct answer is that polymerase synthesizes nucleic acids.

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  • 20. 

    Oxidoreductase Oxidation

    • Transfer fuctional groups

    • Reduction reactions

    • Synthesis nucleic acids

    Correct Answer
    A. Reduction reactions
    Explanation
    The correct answer is reduction reactions. Oxidoreductases are enzymes that catalyze oxidation-reduction reactions, where one molecule is oxidized (loses electrons) and another is reduced (gains electrons). This process involves the transfer of functional groups and plays a crucial role in various biological processes, such as energy production, metabolism, and detoxification. However, the given question is incomplete and difficult to interpret.

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  • 21. 

    What generates fewer molecules ATP, substrate MUST be abundant, sugar are the only substrates uses, most start with glycolysis, may vary how pyruvate used.

    Correct Answer
    Fermentation
    Explanation
    Fermentation is the process that generates fewer molecules of ATP compared to other metabolic pathways. In fermentation, the substrate must be abundant, and sugars are the only substrates used. Most fermentation processes start with glycolysis, which breaks down glucose into pyruvate. The way pyruvate is used may vary depending on the specific type of fermentation.

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  • 22. 

    Dephosporation put things on a cell

    • True

    • False

    Correct Answer
    A. False
    Explanation
    phosporation

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  • 23. 

    What uses energy and building blocks to build large molecules

    Correct Answer
    anabolism
    Explanation
    Anabolism is the process in which energy and building blocks are utilized to construct larger molecules. This process involves the synthesis of complex molecules such as proteins, nucleic acids, and carbohydrates from simpler components. Through anabolism, cells are able to grow and repair tissues, as well as store energy for future use. This process is essential for the maintenance and growth of living organisms.

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  • 24. 

    What gets C from organic molecules

    • Phototroph

    • Chemotroph

    • Heterotroph

    Correct Answer
    A. Heterotroph
    Explanation
    Heterotrophs obtain carbon from organic molecules. Unlike autotrophs, which can produce their own organic molecules through photosynthesis or chemosynthesis, heterotrophs rely on consuming other organisms or their organic waste to obtain carbon for energy and growth. This includes animals, fungi, and many bacteria. Therefore, heterotroph is the correct answer as it accurately describes the organisms that obtain carbon from organic molecules.

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  • 25. 

    In Fermentation, All ATP generated by substrate level phosphorylation.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    In fermentation, ATP is generated by substrate level phosphorylation. This process involves the direct transfer of a phosphate group from a substrate molecule to ADP, forming ATP. This occurs in the absence of oxygen, and is a common pathway for energy production in organisms such as bacteria and yeast. Therefore, the statement that all ATP generated in fermentation is through substrate level phosphorylation is correct.

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  • 26. 

    Hyrdolase

    • Joining of molecules, uses ATP

    • Removal of atoms without hydrolysis

    • Hydrolysis

    Correct Answer
    A. Hydrolysis
    Explanation
    Hydrolysis is the correct answer because it involves the breaking down of molecules by the addition of water. This process is essential for various biological reactions, such as digestion and cellular metabolism. Hydrolysis reactions often require the input of ATP (adenosine triphosphate) as an energy source to drive the reaction forward. In contrast, the other options mentioned, such as joining of molecules and removal of atoms without hydrolysis, do not accurately describe the process of hydrolysis.

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  • 27. 

    Ligase

    • Rearrangement of atoms

    • Removal of atoms without hydrolysis

    • Joining molecules, uses ATP

    Correct Answer
    A. Joining molecules, uses ATP
    Explanation
    Ligase is an enzyme that is responsible for joining molecules together. It does this by forming covalent bonds between the molecules. One important aspect of ligase activity is the use of ATP as a source of energy for the reaction. This energy is required to drive the formation of the covalent bond between the molecules. Ligase does not rearrange atoms or remove atoms without hydrolysis, but rather it specifically catalyzes the joining of molecules.

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  • 28. 

    Is joining together of building blocks precise? NO.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    very precise, think protein structure and order of amino acids, order determined by DNA

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  • 29. 

    This releases energy from oxidation of organic molecules, uses an organic molecule as the final electron and produces small amounts of ATP

    • Chemiosmosis

    • ETC

    • Fermentation

    Correct Answer
    A. Fermentation
    Explanation
    Fermentation is the correct answer because it is a metabolic process that releases energy from the oxidation of organic molecules. It uses an organic molecule as the final electron acceptor and produces small amounts of ATP. In fermentation, the electron transport chain (ETC) is not involved, unlike in chemiosmosis. Fermentation is a common pathway in anaerobic organisms and in certain types of cells when oxygen is limited.

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  • 30. 

    Isomerase

    • Hydrolysis

    • Reduction reactions

    • Rearrangment of atoms

    Correct Answer
    A. Rearrangment of atoms
    Explanation
    Rearrangement of atoms refers to the process in which the arrangement of atoms within a molecule is altered, resulting in the formation of a different molecule or isomer. Isomerase enzymes are known for catalyzing such rearrangement reactions. Hydrolysis and reduction reactions, on the other hand, involve the breaking of chemical bonds and the addition of hydrogen atoms, respectively, but they do not necessarily involve the rearrangement of atoms within a molecule. Therefore, the correct answer is rearrangement of atoms.

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  • 31. 

    Lyase

    • Rearrangement of atoms

    • Removal of atoms without hydrolysis

    • Synthesizes nucleic acids

    Correct Answer
    A. Removal of atoms without hydrolysis
    Explanation
    Lyase is an enzyme that catalyzes the removal of atoms from a molecule without the involvement of hydrolysis. This means that it breaks chemical bonds within a molecule, causing a rearrangement of atoms and resulting in the formation of new products. Unlike hydrolysis, which involves the addition of water molecules to break bonds, lyase acts by directly removing atoms. It is important in various metabolic processes and can play a role in the synthesis or degradation of molecules such as nucleic acids.

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  • 32. 

    If protons and electrols added

    Correct Answer
    hydrogenation
  • 33. 

    RNA can act as enzymes

    • True

    • False

    Correct Answer
    A. True
    Explanation
    RNA can act as enzymes, which are known as ribozymes. Ribozymes are RNA molecules that can catalyze specific biochemical reactions without the need for protein assistance. They can perform various functions, such as cleaving RNA molecules, joining RNA molecules together, and even synthesizing new RNA molecules. This ability of RNA to catalyze chemical reactions supports the hypothesis that RNA may have played a crucial role in the early evolution of life on Earth, before the emergence of protein-based enzymes. Therefore, the statement that RNA can act as enzymes is true.

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  • 34. 

    What produces ethyl alchohol + Co2

    Correct Answer
    Alcohol fermentation
    Explanation
    Alcohol fermentation is the process that produces ethyl alcohol (also known as ethanol) and carbon dioxide. It is a metabolic process carried out by yeast and some bacteria in the absence of oxygen. During alcohol fermentation, glucose or other sugars are broken down into ethanol and carbon dioxide as byproducts. This process is commonly used in the production of alcoholic beverages such as beer, wine, and spirits.

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  • 35. 

    Same pathways are used for all microorganisms.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Are not used by all microorganisms.

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  • 36. 

    When pyruvate from glycolysis oxidized and decarboxylated to...?

    Correct Answer
    Acetyl CoA
    Explanation
    Pyruvate from glycolysis is oxidized and decarboxylated to Acetyl CoA. This process occurs in the mitochondria of the cell and is known as pyruvate decarboxylation. During this process, a carboxyl group is removed from pyruvate, resulting in the formation of Acetyl CoA. Acetyl CoA is an important molecule in cellular respiration as it enters the citric acid cycle to produce ATP, the energy currency of the cell. It is also a precursor for the synthesis of fatty acids and cholesterol.

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  • 37. 

    Where does the reaction occur for Krebs cycle in Euka and Proka

    • Cytoplasm for both

    • Mitochondria and cytoplasm

    • Mitochondrial matrix and cytoplasm

    Correct Answer
    A. Mitochondrial matrix and cytoplasm
    Explanation
    The Krebs cycle, also known as the citric acid cycle, is a series of chemical reactions that occur in the mitochondria of eukaryotic cells and the cytoplasm of prokaryotic cells. In eukaryotic cells, the Krebs cycle primarily takes place in the mitochondrial matrix, which is the innermost compartment of the mitochondria. However, some reactions of the cycle also occur in the cytoplasm. In prokaryotic cells, which lack mitochondria, the entire Krebs cycle occurs in the cytoplasm. Therefore, the correct answer is "Mitochondrial matrix and cytoplasm."

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  • 38. 

    In biological systems, the electrons are often associated with oxygen atoms, biological oxidations are often dehyrogentions

    • True

    • False

    Correct Answer
    A. False
    Explanation
    the electrons are often associate with HYDROGEN atoms

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  • 39. 

    Protons and electrons removed

    Correct Answer
    dehydrogenation
    Explanation
    Dehydrogenation is a chemical reaction that involves the removal of hydrogen atoms from a molecule. In this process, protons (positively charged particles) and electrons (negatively charged particles) are removed from the molecule, resulting in the formation of a double bond between two carbon atoms. This reaction is commonly used in various industrial processes, such as the production of plastics and the synthesis of organic compounds. Therefore, dehydrogenation is the most suitable explanation for the given statement.

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  • 40. 

    Energy released can be used to produce ATP by..

    • Chemiosmosis

    • NADH

    • ADP

    Correct Answer
    A. Chemiosmosis
    Explanation
    Chemiosmosis is the process by which energy released during cellular respiration is used to produce ATP. It involves the movement of protons across a membrane, creating a proton gradient. This gradient is then used by ATP synthase to generate ATP from ADP and inorganic phosphate. NADH is an electron carrier that is involved in the electron transport chain, which ultimately leads to the establishment of the proton gradient. However, NADH itself does not directly produce ATP. ADP is a precursor molecule that is converted to ATP through the process of chemiosmosis.

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  • 41. 

    How many chemical reactions are in E.coli?

    • 1,000

    • 7,000

    • 10,000

    • 2,000

    Correct Answer
    A. 2,000
    Explanation
    The correct answer is 2,000. This suggests that there are 2,000 chemical reactions in E.coli.

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  • 42. 

    Where does Glycolysis happen in a Eukaryote and Prokaryote

    • Cytoplasm for both

    • Cytoplasm, cell wall

    • Cytoplasm and plama membrane

    Correct Answer
    A. Cytoplasm for both
    Explanation
    Glycolysis is a metabolic pathway that occurs in the cytoplasm of both eukaryotic and prokaryotic cells. It is the initial step in cellular respiration and involves the breakdown of glucose into pyruvate. The cytoplasm is the fluid-filled region inside the cell where most cellular processes take place. In eukaryotes, which include organisms like plants and animals, the cytoplasm is enclosed within a membrane-bound organelle called the cell nucleus. Prokaryotes, on the other hand, such as bacteria, lack a nucleus and their genetic material is not enclosed within a membrane. However, both types of cells have a cytoplasm where glycolysis occurs.

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  • 43. 

    What enzymes are NOT protiens

    Correct Answer
    Ribozymes
    Explanation
    Ribozymes are RNA molecules that can catalyze specific biochemical reactions. Unlike enzymes, which are typically proteins, ribozymes are composed of RNA instead. This makes ribozymes unique as they have the ability to catalyze reactions without the need for protein components. Therefore, ribozymes are an example of enzymes that are not proteins.

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  • 44. 

    The turnover number for enzymes is generally 1-1,000 molecules per second

    • True

    • False

    Correct Answer
    A. False
    Explanation
    1-10,000.

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  • 45. 

    Enzymes can be denatured by

    Correct Answer
    temperature and pH
    Explanation
    Enzymes can be denatured by temperature and pH because both factors can disrupt the enzyme's structure and alter its active site. High temperatures can break the weak bonds that maintain the enzyme's shape, causing it to unfold and lose its function. Similarly, extreme pH levels can affect the charges on the amino acids in the enzyme, leading to a change in its shape and loss of activity. Therefore, controlling temperature and pH is crucial to maintaining the stability and functionality of enzymes.

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  • 46. 

    Anaerobie respiration is the first electron acceptor in the ETC is O2, yields less energy than aeriobic respiration because only part of the Krebs cycles operations under anaerobic condtions

    • True

    • False

    Correct Answer
    A. False
    Explanation
    this is the final electron acceptor in ETC is NOT o2

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  • 47. 

    This produces latic acid only

    Correct Answer
    Homolactic Fermentation
    Explanation
    Homolactic fermentation is a type of fermentation that produces only lactic acid as the end product. In this process, glucose is converted into two molecules of lactic acid through a series of chemical reactions. This type of fermentation is commonly observed in certain bacteria and yeast, as well as in our muscles during intense exercise when oxygen supply is limited. The production of lactic acid is important for various industrial applications, such as in the production of yogurt and sauerkraut.

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  • 48. 

    E.coli requires some supplements.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    REQUIRES NO SUPPLEMENTS

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  • 49. 

    Catabolism Generate

    Correct Answer
    12 precursor metabolities, ATP, Reducing power
    Explanation
    Catabolism is a metabolic process that involves the breakdown of complex molecules into simpler ones, releasing energy in the process. During catabolism, 12 precursor metabolites are generated, which are essential molecules that serve as building blocks for various cellular processes. Additionally, ATP (adenosine triphosphate) is produced, which is the energy currency of the cell. Furthermore, reducing power is generated, which refers to the transfer of electrons from one molecule to another, providing energy for various cellular reactions.

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  • Mar 20, 2023
    Quiz Edited by
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  • May 19, 2011
    Quiz Created by
    Jessjessx0x

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