- 1(current)
Q. No.Consider the given two statements:
| Assertion (A): | It is important that in muscles during exercise, when oxygen is inadequate for cellular respiration pyruvic acid is reduced to lactic acid. |
| Reason (R): | NAD+ is regenerated in this step. |
| 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: Â Fermentation |
From NCERT
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When deprived of oxygen, yeast cells obtain energy by fermentation, producing carbon dioxide, ATP, and
1. acetyl CoA
2. ethyl alcohol
3. lactate
4. pyruvate
1. acetyl CoA
2. ethyl alcohol
3. lactate
4. pyruvate
Subtopic: Â Fermentation |
 91%
From NCERT
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During strenuous muscle activity, the pyruvate in muscle cells may accept hydrogen from NADH to become ______________ .
1. acetyl CoA
2. ethyl alcohol
3. lactate
4. pyruvate
1. acetyl CoA
2. ethyl alcohol
3. lactate
4. pyruvate
Subtopic: Â Fermentation |
 91%
From NCERT
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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%
1. Less than 7%
2. Approximately 15%
3. More than 18%
4. About 10%
Subtopic: Â Fermentation |
 89%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
Hints
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NEET 2025 - Target Batch
In which one of the following processes CO2 is not released?
1. Aerobic respiration in plants
2. Aerobic respiration in animals
3. Alcoholic fermentation
4. Lactate fermentation
Subtopic: Â Fermentation |
 75%
AIPMT - 2014
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NEET 2025 - Target Batch
Hints
The reaction 2 in the given figure is catalysed by the enzyme:
1. Pyruvate decarboxylase
2. Pyruvate kinase
3. Pyruvate dehydrogenase
4. Pyruvate synthetase
1. Pyruvate decarboxylase2. Pyruvate kinase
3. Pyruvate dehydrogenase
4. Pyruvate synthetase
Subtopic: Â Fermentation |
 71%
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Hints
During fermentation Yeasts poison themselves to death when the concentration of alcohol reaches about:
1. 5 percent
2. 13 per cent
3. 22 per cent
4. 44 per cent
1. 5 percent
2. 13 per cent
3. 22 per cent
4. 44 per cent
Subtopic: Â Fermentation |
 97%
From NCERT
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