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Q. No.Subtopic: Fermentation |
75%
Level 2: 60%+
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There is one step in glycolysis where NADH + H+ is formed from NAD+ ; this is when:
| 1. | The fructose 1, 6-bisphosphate is split into dihydroxyacetone phosphate and 3-phosphoglyceraldehyde (PGAL). |
| 2. | 3-phosphoglyceraldehyde (PGAL) is converted to 1, 3-bisphosphoglycerate (BPGA). |
| 3. | BPGA is converted to 3-phosphoglyceric acid (PGA). |
| 4. | Glucose and fructose are phosphorylated to give rise to glucose-6- phosphate. |
Subtopic: Glycolysis |
81%
Level 1: 80%+
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Arrange the following events in the order of their occurrence during aerobic respiration [earliest to latest]:
1. A - B - C - D
2. A - D - B - C
3. D - C- B - A
4. B - A - C - D
| A: | Oxidative decarboxylation of pyruvate. |
| B: | Oxidative decarboxylation of isocitrate. |
| C: | Oxidative decarboxylation of alpha ketoglutarate. |
| D: | Oxidation of malic acid to oxaloacetic acid. |
2. A - D - B - C
3. D - C- B - A
4. B - A - C - D
Subtopic: Kreb's Cycle |
83%
Level 1: 80%+
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Consider the given two statements:
Options:
| Assertion (A): | Naturally fermented alcoholic beverages never exceed 13% alcohol concentration. |
| Reason (R): | Yeasts die when the concentration of alcohol reaches around 13%, as alcohol becomes toxic to them. |
| 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: Fermentation |
89%
Level 1: 80%+
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Which of the following represents the correct sequence of intermediates formed during one turn of the Krebs cycle, starting with the combination of acetyl CoA and OAA?
| 1. | Oxaloacetic acid → Malic acid → Fumaric acid → Succinic acid → Succinyl CoA → α-ketoglutaric acid → Isocitric acid → Citric acid |
| 2. | Citric acid → α-ketoglutaric acid → Isocitric acid → Succinic acid → Succinyl CoA → Malic acid → Fumaric acid → Oxaloacetic acid |
| 3. | Acetyl CoA → Pyruvate → Citric acid → Malic acid → Oxaloacetic acid |
| 4. | Citric acid → Isocitric acid → α-ketoglutaric acid → Succinyl CoA → Succinic acid → Fumaric acid → Malic acid → Oxaloacetic acid |
Subtopic: Kreb's Cycle |
84%
Level 1: 80%+
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Match List-I with List-II regarding different respiratory substrates and their respective Respiratory Quotients (RQ):
Choose the correct answer from the options given below:
1. A-II, B-I, C-III, D-IV
2. A-II, B-IV, C-I, D-III
3. A-I, B-II, C-III, D-IV
4. A-II, B-I, C-IV, D-III
| List-I (Respiratory Substrate) |
List-II (RQ Value) |
||
| A. | Glucose | I. | Less than 1 |
| B. | Fatty acids | II. | Equal to 1 |
| C. | Proteins | III. | Less than 1 |
| D. | Anaerobic respiration in yeast | IV. | Not applicable / Zero |
1. A-II, B-I, C-III, D-IV
2. A-II, B-IV, C-I, D-III
3. A-I, B-II, C-III, D-IV
4. A-II, B-I, C-IV, D-III
Subtopic: Respiratory Quotient |
86%
Level 1: 80%+
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Oxidative phosphorylation in respiration differs from photophosphorylation in photosynthesis because:
| 1. | It occurs in the cytoplasm instead of organelles. |
| 2. | It does not involve a proton gradient for ATP synthesis. |
| 3. | It directly synthesizes ATP without involving any electron transport chain. |
| 4. | It uses oxidation-reduction energy instead of light energy to create a proton gradient. |
Subtopic: Oxidative Phosphorylation |
82%
Level 1: 80%+
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In aerobic respiration, the total number of ATP molecules generated from complete oxidation of one molecule of glucose (assuming maximum yield) is:
| 1. | 28 | 2. | 30 |
| 3. | 36 | 4. | 38 |
Subtopic: Aerobic Respiration |
95%
Level 1: 80%+
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Which among the following is the universal hydrogen acceptor during glycolysis and Krebs cycle before electrons enter the electron transport chain?
1. CoA
2. FAD
3. NAD⁺
4. ATP
1. CoA
2. FAD
3. NAD⁺
4. ATP
Subtopic: Glycolysis | Aerobic Respiration |
81%
Level 1: 80%+
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Which is the only step of the Krebs cycle where substrate-level phosphorylation occurs?
| 1. | Oxaloacetate → Citrate |
| 2. | Fumarate → Malate |
| 3. | Isocitrate → α-ketoglutarate |
| 4. | Succinyl-CoA → Succinate |
Subtopic: Kreb's Cycle |
83%
Level 1: 80%+
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