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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 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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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Q. No.
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