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Q. No.Consider the following statements:
A single turn of the Krebs citric acid cycle produces
A: one molecule of FADH2
B: two molecules of CO2
1. only A is correct
2. only B is correct
3. both A and B are correct
4. both A and B are incorrect
A single turn of the Krebs citric acid cycle produces
A: one molecule of FADH2
B: two molecules of CO2
1. only A is correct
2. only B is correct
3. both A and B are correct
4. both A and B are incorrect
Subtopic: Kreb's Cycle |
77%
Level 2: 60%+
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When fatty acids are being used as respiratory substrates, they enter cellular respiration as:
1. Glucose
2. Glyceraldehyde Phosphate
3. Pyruvate
4. Acetyl Coenzyme A
1. Glucose
2. Glyceraldehyde Phosphate
3. Pyruvate
4. Acetyl Coenzyme A
Subtopic: The Respiratory Balance Sheet |
79%
Level 2: 60%+
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Which of the following takes place in the step where succinyl coenzyme A is converted to succinic acid in the TCA cycle?
1. One molecule of ATP is directly synthesized.
2. NAD+ is reduced.
3. FAD is reduced.
4. One molecule of GTP is synthesized.
Subtopic: Kreb's Cycle |
82%
Level 1: 80%+
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What is the number of carbon dioxide molecules produced during the 10 metabolic reactions of glycolytic pathway?
1. 0
2. 1
3. 2
4. 3
1. 0
2. 1
3. 2
4. 3
Subtopic: Glycolysis |
85%
Level 1: 80%+
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Consider the given two statements:
Choose the correct option.
| Assertion (A): | Plants do not require specialized respiratory organs. |
| Reason (R): | Every plant part takes care of its own gas exchange needs through stomata and lenticels. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Introduction |
93%
Level 1: 80%+
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| Assertion (A): | The processes of lactic acid and alcohol fermentation are less efficient in harnessing the energy stored in glucose compared to aerobic respiration. |
| Reason (R): | In these fermentation pathways, the incomplete breakdown of glucose occurs under anaerobic conditions, where oxygen is not available. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Fermentation |
84%
Level 1: 80%+
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In mitochondrial electron transport chain:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | Complex I is NADH dehydrogenase |
| II: | Complex II is succinate dehydrogenase |
| III: | Complex III is cytochrome b6f complex. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: ETS |
57%
Level 3: 35%-60%
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The carbohydrates, in aerobic cellular respiration, are ultimately broken down into:
| 1. | acetyl-CoA | 2. | CO2 |
| 3. | O2 | 4. | heat |
Subtopic: Aerobic Respiration |
61%
Level 2: 60%+
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Oxidation of acetyl-CoA via the TCA cycle requires:
1. Only I is correct
2. Only II is correct
3. Neither I nor II is correct
4. Both I and II are correct
| I: | The continued replenishment of oxaloacetic acid. |
| II: | The regeneration of NAD+ and FAD. |
1. Only I is correct
2. Only II is correct
3. Neither I nor II is correct
4. Both I and II are correct
Subtopic: Kreb's Cycle |
70%
Level 2: 60%+
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The energy for the production of ATP by oxidative phosphorylation is provided by:
1. Sunlight
2. Coenzyme A
3. Chemiosmosis of protons across the ATP synthase
4. Cytochromes of the electron transport chain
1. Sunlight
2. Coenzyme A
3. Chemiosmosis of protons across the ATP synthase
4. Cytochromes of the electron transport chain
Subtopic: Oxidative Phosphorylation |
72%
Level 2: 60%+
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