- 1(current)
Q. No.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 |
83%
Level 1: 80%+
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Regarding the transition [link] reaction:
1. Only I and II are correct
2. Only III and IV are correct
3. Only I and III are correct
4. Only II and IV are correct
| I: | It occurs in the matrix of mitochondria. |
| II: | It links glycolysis to the Krebs cycle. |
| III: | Two oxygen molecules are given off from glucose. |
| IV: | Four NADH molecules are formed from the reaction. |
1. Only I and II are correct
2. Only III and IV are correct
3. Only I and III are correct
4. Only II and IV are correct
Subtopic: Glycolysis | Glycolysis Regulation | Kreb's Cycle |
90%
Level 1: 80%+
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Which enzyme/s takes part in both mitochondrial ETS and Kreb’s cycle?
| I: | NADH dehydrogenase |
| II: | Succinate dehydrogenase |
| III: | Isocitrate dehydrogenase |
| 1. | Only II |
| 2. | Only I and II |
| 3. | Only III |
| 4. | I, II and III |
Subtopic: Kreb's Cycle |
Level 3: 35%-60%
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In the Krebs cycle, two successive steps of decarboxylation result in the formation of:
| 1. | α-ketoglutarate | 2. | Isocitrate |
| 3. | Succinyl CoA | 4. | Succinic acid |
Subtopic: Kreb's Cycle |
62%
Level 2: 60%+
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During a turn of the Krebs cycle during aerobic cellular respiration, all the following will be produced:
| I: | carbon dioxide |
| II: | ATP |
| III: | water |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
Subtopic: Kreb's Cycle |
56%
Level 3: 35%-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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Enzyme that catalyses the decarboxylation of pyruvic acid to acetaldehyde is:
1. Pyruvate dehydrogenase
2. Pyruvate kinase
3. Pyruvate decarboxylase
4. Pyruvate translocase
1. Pyruvate dehydrogenase
2. Pyruvate kinase
3. Pyruvate decarboxylase
4. Pyruvate translocase
Subtopic: Kreb's Cycle |
63%
Level 2: 60%+
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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 |
78%
Level 2: 60%+
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- 1(current)
Q. No.
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