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Q. No.| Fermentation | Aerobic respiration | |
| I. | Partial breakdown of glucose | Complete breakdown of glucose |
| II. | Net gain of only two molecules of ATP beginning with one molecule of glucose | Net gain of many more molecules of ATP beginning with one molecule of glucose |
| III. | NADH is oxidised to NAD+ slowly | NADH is oxidised to NAD+ vigorously |
| 1. Only I and II | 2. Only I and III |
| 3. Only II and III | 4. I, II and III |
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The maximum concentration of alcohol in beverages that are naturally fermented is about:
| 1. 5 – 8 % | 2. 13 – 15 % |
| 3. 33 – 34 % | 4. 47 – 49 % |
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I: Yeasts perform this metabolic conversion when growing in the absence of oxygen.
II: The metabolic conversion of pyruvate into acetaldeyhde is catalysed by the enzyme pyruvate dehydrogenase.
III: The metabolic conversion of acetaldehyde into ethanol is catalysed by the enzyme alcohol dehydrogenase.
| 1. I and II | 2. I and III |
| 3. II and III | 4. I, II and III |
What is the number of ATP molecules produced when pyruvate is converted to lactate by fermentation?
| 1. 0 | 2. 2 |
| 3. 4 | 4. 38 |
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To unlock all the explanations of this course, you need to be enrolled.
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Consider the given statements:
Statement I: In alcohol fermentation in yeast, pyruvic acid decarboxylase and alcohol dehydrogenase convert pyruvic acid to carbon dioxide and ethanol.
Statement II: In lactic acid fermentation, lactate dehydrogenase reduces pyruvic acid to lactic acid and carbon dioxide in muscle cells during exercise.
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct
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- 1(current)
Q. No.
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