Which of the following exhibits the highest rate of respiration?
1. Growing shoot apex | 2. Germinating seed |
3. Root tip | 4. Leaf bud |
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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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I: | Transport of gases from the respiratory surface to the cells |
II: | Breakdown of food material within the cell to release energy |
III: | Trapping of energy released during the breakdown of food material within the cell for synthesis of ATP |
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 products of fermentation do not include:
1. | CO2 | 2. | O2 |
3. | ethanol | 4. | lactate |
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Pyruvic acid, the key product of glycolysis can have many metabolic fates. Under aerobic condition, it forms
1. | Lactic acid | 2. | CO2 + H2O |
3. | Acetyl CoA + CO2 | 4. | Ethanol + CO2 |
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Oxidative decarboxylation of pyruvate produces:
1. | 2. Citrate |
3. Acetyl-CoA | 4. G3P |
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1. | Eight molecules of NADH + H+ |
2. | Two molecules of FADH2 |
3. | Two molecules of ATP |
4. | Four molecules of carbon dioxide |
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According to NCERT textbook, what is the number of ATP molecules that can be regarded as a net gain during aerobic respiration of one molecule of glucose?
1. 2 | 2. 30 |
3. 36 | 4. 38 |
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1. | 30 ATP molecules | 2. | 36 ATP molecules |
3. | 38 ATP molecules | 4. | 40 ATP molecules |
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