Bio Quiz About Pharmacy
Know it all about the basics of biology and pharmacy in this interactive quiz, test your knowledge by answering these questions.
Questions and Answers
- 1.
What is the term for " partial degradation of sugars or other organic fuel without the use of oxygen ?
- A.
Anaerobic respiration
- B.
Aerobic respiration
- C.
Fermentation
- D.
Catabolic pathways
Correct Answer
C. FermentationExplanation
Fermentation is the correct answer because it refers to the process of breaking down sugars or organic fuel without the use of oxygen. This process occurs in the absence of oxygen and produces energy in the form of ATP. Fermentation is commonly used by microorganisms to convert sugars into alcohol or lactic acid.Rate this question:
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- 2.
What is the stage of cellular respiration that can occur with or without the use of O2?
- A.
Glycolysis
- B.
Citric Acid Cycle
- C.
Oxidative Phosphorylation
- D.
Pyruvate Oxidation
Correct Answer
A. GlycolysisExplanation
Glycolysis is the stage of cellular respiration that can occur with or without the use of O2. It is the initial step in breaking down glucose and does not require oxygen. During glycolysis, glucose is converted into pyruvate, producing a small amount of ATP and NADH. This process occurs in the cytoplasm of the cell and is the first step in both aerobic and anaerobic respiration.Rate this question:
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- 3.
In reduction reaction the amount of positive charge of the atom is reduced when adding negatively charged electron.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
In a reduction reaction, the amount of positive charge of an atom is indeed reduced when adding negatively charged electrons. This is because electrons have a negative charge, and when they are added to an atom, they neutralize some of the positive charge, resulting in a reduction of the overall positive charge of the atom. Therefore, the statement is true.Rate this question:
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- 4.
When electrons move closer to a more electronegative atom, what happens?
- A.
The more electronegative atom is reduced, and energy is released.
- B.
The more electronegative atom is reduced, and energy is consumed.
- C.
The more electronegative atom is oxidized, and energy is consumed.
- D.
The more electronegative atom is oxidized, and energy is released.
Correct Answer
A. The more electronegative atom is reduced, and energy is released.Explanation
When electrons move closer to a more electronegative atom, the atom gains electrons and is reduced. This reduction process releases energy.Rate this question:
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- 5.
How many CO2 molecules will result from 15 pyruvate molecules during citric acid cycle?
- A.
15
- B.
20
- C.
40
- D.
30
Correct Answer
D. 30Explanation
During the citric acid cycle, each pyruvate molecule is converted into one molecule of acetyl-CoA, which then enters the cycle. In one round of the citric acid cycle, each acetyl-CoA molecule produces 3 molecules of NADH and 1 molecule of FADH2. These electron carriers are then used in the electron transport chain to produce ATP. Since each pyruvate molecule produces 3 molecules of NADH, and there are 15 pyruvate molecules, the total number of NADH molecules produced is 15 x 3 = 45. During the electron transport chain, each NADH molecule produces 3 molecules of ATP, so the total number of ATP molecules produced is 45 x 3 = 135. Finally, during oxidative phosphorylation, each ATP molecule produces 1 molecule of CO2, so the total number of CO2 molecules produced is 135. Therefore, the correct answer is 30.Rate this question:
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- 6.
When a molecule of NAD+ gains a hydrogen atom (not a proton), the molecule becomes
- A.
Oxidized
- B.
Reduced
- C.
Hydrolyzed
- D.
dehydrogenated.
Correct Answer
B. ReducedExplanation
When a molecule of NAD+ gains a hydrogen atom, it undergoes a reduction reaction. Reduction is the gain of electrons or a decrease in oxidation state. In this case, NAD+ is gaining a hydrogen atom, which includes an electron, causing a reduction in NAD+. Therefore, the correct answer is "Reduced".Rate this question:
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- 7.
How many ATP's are produced from 10 glucose by substrate level phosphorylation during cellular respiration?
- A.
40
- B.
15
- C.
10
- D.
32
Correct Answer
A. 40Explanation
During cellular respiration, each molecule of glucose can produce a maximum of 4 ATP molecules through substrate level phosphorylation. Since there are 10 glucose molecules, multiplying 4 ATP by 10 gives us a total of 40 ATP molecules. Therefore, the correct answer is 40.Rate this question:
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- 8.
Where does glycolysis take place in eukaryotic cells?
- A.
mitochondrial matrix
- B.
Mitochondrial outer membrane
- C.
Mitochondrial inner membrane
- D.
cytosol
Correct Answer
D. cytosolExplanation
Glycolysis takes place in the cytosol of eukaryotic cells. This is the process in which glucose is broken down into pyruvate, producing ATP and NADH. The cytosol is the fluid portion of the cell where many metabolic reactions occur. The mitochondria, on the other hand, are responsible for the aerobic respiration of pyruvate, which occurs after glycolysis.Rate this question:
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- 9.
How many carbon atoms are fed into the citric acid cycle as a result of the oxidation of one molecule of pyruvate?
- A.
2
- B.
4
- C.
6
- D.
10
Correct Answer
A. 2Explanation
During the citric acid cycle, one molecule of pyruvate is oxidized to produce one molecule of acetyl-CoA. Acetyl-CoA is a two-carbon molecule, which enters the citric acid cycle. Therefore, the oxidation of one molecule of pyruvate results in the entry of two carbon atoms into the citric acid cycle.Rate this question:
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- 10.
Which downhill route does the electrons travel throgh during cellular respiration
- A.
Glucose----NADH-----electron transport chain-----oxygen
- B.
NADH----electron transport chain -----oxygen
- C.
Glucose-----electron transport chain -----NADH -----oxygen
Correct Answer
A. Glucose----NADH-----electron transport chain-----oxygenExplanation
During cellular respiration, the electrons travel through the downhill route of glucose-NADH-electron transport chain-oxygen. This is because glucose is broken down into NADH during glycolysis and the Krebs cycle. NADH then donates its electrons to the electron transport chain, which is a series of protein complexes in the inner mitochondrial membrane. The electrons are passed along the chain, creating a proton gradient, and ultimately combine with oxygen to form water. Therefore, the correct route is glucose-NADH-electron transport chain-oxygen.Rate this question:
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- 11.
What is the process that is used in both fermentation and respiration and is known as the most widespread metabolic pathway on earth ?
- A.
Oxidative phosphorylation
- B.
Glycolysis
- C.
Substrate level phosphorylation
- D.
Citric acid cycle
Correct Answer
B. GlycolysisExplanation
Glycolysis is the process that is used in both fermentation and respiration and is known as the most widespread metabolic pathway on earth. It is the initial step in the breakdown of glucose, where glucose is converted into pyruvate. This process occurs in the cytoplasm of cells and does not require oxygen. In fermentation, pyruvate is further metabolized to produce energy in the absence of oxygen, while in respiration, pyruvate enters the citric acid cycle and oxidative phosphorylation to generate energy in the presence of oxygen.Rate this question:
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- 12.
In anaerobic conditions the electrons transfer from NADH to Pyruvate
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
In anaerobic conditions, when there is a lack of oxygen, the process of cellular respiration cannot proceed normally. Instead, the electrons from NADH molecules are transferred to pyruvate molecules. This process is known as fermentation and it allows the regeneration of NAD+ so that glycolysis can continue to produce ATP. Therefore, the statement "in anaerobic conditions, the electrons transfer from NADH to pyruvate" is true.Rate this question:
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- 13.
Lactic acid fermentation is used in ?
- A.
Dairy industry
- B.
Human muscle cells
- C.
Wine making and baking
- D.
1+2
Correct Answer
D. 1+2Explanation
Lactic acid fermentation is used in both the dairy industry and human muscle cells. In the dairy industry, lactic acid fermentation is used to produce yogurt, cheese, and other dairy products. In human muscle cells, lactic acid fermentation occurs during intense exercise when the body cannot supply enough oxygen to the muscles. This process helps convert glucose into energy and produces lactic acid as a byproduct. Therefore, the correct answer is 1+2, indicating that lactic acid fermentation is used in both the dairy industry and human muscle cells.Rate this question:
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- 14.
The final electron acceptor in Alcohol fermentation is acetaldehyde
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
In alcohol fermentation, the final electron acceptor is acetaldehyde. During this process, glucose is converted into ethanol and carbon dioxide through a series of biochemical reactions. Acetaldehyde is formed as an intermediate product, and it accepts the electrons generated during the breakdown of glucose. Eventually, acetaldehyde is further reduced to ethanol, which is the final product of alcohol fermentation. Therefore, the given statement that acetaldehyde is the final electron acceptor in alcohol fermentation is true.Rate this question:
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- 15.
During aerobic respiration, which of the following directly donates electrons to the electron transport chain at the lowest energy level?
- A.
NADH
- B.
NAD+
- C.
FADH2
- D.
ATP
Correct Answer
C. FADH2Explanation
FADH2 directly donates electrons to the electron transport chain at the lowest energy level during aerobic respiration. FADH2 is a high-energy molecule that is produced during the Krebs cycle. It carries electrons to the electron transport chain, where the electrons are passed along a series of protein complexes, ultimately generating ATP. NADH also donates electrons to the electron transport chain, but at a higher energy level. NAD+ is the oxidized form of NADH and does not directly donate electrons to the electron transport chain. ATP is not involved in directly donating electrons to the electron transport chain.Rate this question:
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- 16.
Where is ATP synthase located in the mitochondrion?
- A.
Electron transport chain
- B.
Cytosol
- C.
outer membrane
- D.
inner membrane
Correct Answer
D. inner membraneExplanation
ATP synthase is located in the inner membrane of the mitochondrion. This is where the electron transport chain takes place, and ATP synthase plays a crucial role in this process. It uses the energy from the movement of protons across the inner membrane to generate ATP, which is the main energy currency of the cell. Therefore, it is essential for ATP synthase to be located in the inner membrane to efficiently produce ATP.Rate this question:
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- 17.
Which one do you like?
- A.
Option 1
- B.
Option 2
- C.
Option 3
- D.
Option 4
Correct Answer
A. Option 1 -
- 18.
Approximately how many molecules of ATP are produced from the complete oxidation of two molecules of glucose (C6H12O6) in aerobic cellular respiration?
- A.
2
- B.
30-32
- C.
15
- D.
60-64
Correct Answer
D. 60-64Explanation
During aerobic cellular respiration, each molecule of glucose produces a net gain of 36-38 ATP molecules. Since two molecules of glucose are being completely oxidized, the total number of ATP molecules produced would be approximately double that, resulting in a range of 60-64 ATP molecules.Rate this question:
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- 19.
What is proton-motive force?
- A.
the force required to remove an electron from hydrogen
- B.
The force exerted on a proton by a transmembrane proton concentration gradient
- C.
the force that moves hydrogen into the intermembrane space
- D.
The force that moves hydrogen into the intermembrane space
Correct Answer
B. The force exerted on a proton by a transmembrane proton concentration gradientExplanation
The proton-motive force refers to the force exerted on a proton by a transmembrane proton concentration gradient. This means that when there is a difference in proton concentration on either side of a membrane, there is a force that pushes the protons across the membrane. This force is important in various biological processes, such as ATP synthesis in mitochondria, where the movement of protons across the membrane drives the production of ATP.Rate this question:
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Current Version
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Mar 19, 2023Quiz Edited by
ProProfs Editorial Team -
May 01, 2020Quiz Created by
Pharmacgy
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