- 1(current)
Q. No.Before pyruvate enters the citric acid cycle, it is decarboxylated, oxidized, and combined with coenzyme A, forming acetyl CoA, carbon dioxide, and one molecule of
| 1. | NADH | 2. | FADH2 |
| 3. | ATP | 4. | ADP |
Subtopic: Â Aerobic Respiration |Â Kreb's Cycle |
 86%
From NCERT
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In the first step of the citric acid cycle, acetyl CoA reacts with oxaloacetate to form
1. pyruvate
2. citrate
3. NADH
4. ATP
1. pyruvate
2. citrate
3. NADH
4. ATP
Subtopic: Â Kreb's Cycle |
 94%
From NCERT
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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: Â Kreb's Cycle |
 75%
From NCERT
NEET - 2017
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The number of substrate level of phosphorylations in one turn of citric acid cycle is:
| 1. | One | 2. | Two |
| 3. | Three | 4. | Four |
Subtopic: Â Kreb's Cycle |
 72%
From NCERT
NEET - 2020
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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: Â Aerobic Respiration |Â Kreb's Cycle |
 73%
From NCERT
NEET - 2023
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Subtopic: Â Kreb's Cycle |
 72%
From NCERT
NEET - 2023
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The number of time(s) decarboxylation of isocitrate occurs during single TCA cycle is :
1. One
2. Two
3. Three
4. Four
1. One
2. Two
3. Three
4. Four
Subtopic: Â Kreb's Cycle |
 66%
From NCERT
NEET - 2022
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The 5-C compound formed during TCA cycle is :
1. \(\alpha-\)ketoglutaric acid
2. Oxalo succinic acid
3. Succinic acid
4. Fumaric acid
1. \(\alpha-\)ketoglutaric acid
2. Oxalo succinic acid
3. Succinic acid
4. Fumaric acid
Subtopic: Â Kreb's Cycle |
 88%
From NCERT
NEET - 2022
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In the TCA cycle, a molecule of GTP is synthesised:
1. During the first oxidative decarboxylation reaction
2. During the second oxidative decarboxylation reaction
3. During the condensation of acetyl group with oxaloacetic acid (OAA) and water to yield citric acid
4. During the conversion of succinyl-CoA to succinic acid
1. During the first oxidative decarboxylation reaction
2. During the second oxidative decarboxylation reaction
3. During the condensation of acetyl group with oxaloacetic acid (OAA) and water to yield citric acid
4. During the conversion of succinyl-CoA to succinic acid
Subtopic: Â Kreb's Cycle |
 90%
From NCERT
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The number of points in the TCA cycle where FAD+ is reduced to FADH2 is/are:
1. 1
2. 2
3. 3
4. 4
1. 1
2. 2
3. 3
4. 4
Subtopic: Â Kreb's Cycle |
 89%
From NCERT
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