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Q. No.Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements, choose the correct answer from the options given below :
| Assertion (A): | ATP is used at two steps in glycolysis. |
| Reason (R): | First ATP is used in converting glucose into glucose-6-phosphate and second ATP is used in conversion of fructose-6-phosphate into fructose-1-6-diphosphate. |
| 1. | (A) is False but (R) is True. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | (A) is True but (R) is False. |
Subtopic: Glycolysis |
82%
Level 1: 80%+
NEET - 2023
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Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by:
| 1. | Phosphofructokinase | 2. | Aldolase |
| 3. | Hexokinase | 4. | Enolase |
Subtopic: Glycolysis |
91%
Level 1: 80%+
NEET - 2019
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What amount of energy is released from glucose during lactic acid fermentation?
| 1. | Less than 7% | 2. | Approximately 15% |
| 3. | More than 18% | 4. | About 10% |
Subtopic: Fermentation |
89%
Level 1: 80%+
NEET - 2022
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Which of the following statements are correct about respiration?
Choose the correct answer from the options given below:
| A. | Energy of oxidation-reduction is utilised for phosphorylation |
| B. | Oxygen acts as the final hydrogen acceptor |
| C. | The photo-oxidative energy is utilised for production of proton gradient required for phosphorylation |
| D. | The role of oxygen is limited to the terminal stage of the respiration process |
| E. | Protons cross the outer membrane of mitochondria through the channel formed by an integral membrane protein complex |
| 1. | A, B, C, E only | 2. | A, B, D only |
| 3. | B, C, D, E only | 4. | A, C, D only |
Subtopic: ETS |
56%
Level 3: 35%-60%
NEET - 2024
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Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate?
1. Succinic acid \(\rightarrow\) Malic acid
2. Succinyl-CoA \(\rightarrow\) Succinic acid
3. Isocitrate \(\rightarrow\) \(\alpha\) - ketoglutaric acid
4. Malic acid \(\rightarrow\) Oxaloacetic acid
1. Succinic acid \(\rightarrow\) Malic acid
2. Succinyl-CoA \(\rightarrow\) Succinic acid
3. Isocitrate \(\rightarrow\) \(\alpha\) - ketoglutaric acid
4. Malic acid \(\rightarrow\) Oxaloacetic acid
Subtopic: Kreb's Cycle |
Level 3: 35%-60%
NEET - 2024
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Match List-I with List-II
Choose the correct answer from the options given below:
| List-I | List-II | ||
| A. | Oxidative decarboxylation | I. | Citrate synthase |
| B. | Glycolysis | II. | Pyruvate dehydrogenase |
| C. | Oxidative phosphorylation | III. | Electron transport system |
| D. | Tricarboxylic acid cycle | IV. | EMP pathway |
| Options: | A | B | C | D |
| 1. | II | IV | III | I |
| 2. | III | IV | II | I |
| 3. | II | IV | I | III |
| 4. | III | I | II | IV |
Subtopic: Aerobic Respiration | Kreb's Cycle |
73%
Level 2: 60%+
NEET - 2023
Hints
Which of the following statements is incorrect?
| 1. | ATP is synthesized through complex V. |
| 2. | Oxidation-reduction reactions produce a proton gradient in respiration. |
| 3. | During aerobic respiration, the role of oxygen is limited to the terminal stage. |
| 4. | In ETC (Electron Transport Chain), one molecule of NADH+H+ gives rise to 2 ATP molecules, and one FADH2 gives rise to 3 ATP molecules. |
Subtopic: ETS |
85%
Level 1: 80%+
NEET - 2021
Hints
Which of the following statements regarding mitochondria is incorrect?
| 1. | Mitochondrial matrix contains single circular DNA molecule and ribosomes. |
| 2. | Outer membrane is permeable to monomers of carbohydrates, fats, and proteins. |
| 3. | Enzymes of electron transport are embedded in the outer membrane. |
| 4. | Inner membrane is convoluted with infoldings. |
Subtopic: ETS |
74%
Level 2: 60%+
NEET - 2019
Hints
What is the role of NAD+ in cellular respiration?
| 1. | It functions as an enzyme |
| 2. | It functions as an electron carrier |
| 3. | It is a nucleotide source for ATP synthesis |
| 4. | It is the final electron acceptor for anaerobic respiration |
Subtopic: Aerobic Respiration |
58%
Level 3: 35%-60%
NEET - 2018
Hints
Which statement is wrong for Krebs' cycle?
| 1. | There is one point in the cycle where FAD+ is reduced to FADH2 . |
| 2. | During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesized. |
| 3. | The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid. |
| 4. | There are three points in the cycle where NAD+ is reduced to NADH + H+. |
Subtopic: Kreb's Cycle |
75%
Level 2: 60%+
NEET - 2017
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