1. | Thrice | 2. | Many |
3. | Once | 4. | Twice |
Assertion (A): | ATP acts as the energy currency of the cell. |
Reason (R): | Energy trapped in ATP is utilized in various energy-requiring processes of the organisms. |
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. | Both (A) and (R) are false. |
Assertion (A): | Plants have stomata and lenticels that ensure the availability of O2. |
Reason (R): | Plants require CO2 for respiration and they give out O2. |
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. | Both (A) and (R) are false. |
Assertion (A): | When a plant cell is photosynthesizing, there is no shortage of O2. |
Reason (R): | O2 is released within the cell, during photosynthesis. |
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. | Both (A) and (R) are false. |
Assertion (A): | Although the aerobic process of respiration takes place only in the presence of O2, the role of O2 is limited to the terminal stage of the process. |
Reason (R): | Oxygen acts as the final hydrogen acceptor in ETS. |
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. | Both (A) and (R) are false. |
Assertion (A): | There can be a net gain of 38 ATP molecules during aerobic respiration of one molecule of glucose. |
Reason (R): | Fermentation accounts for a complete breakdown of glucose. |
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. | Both (A) and (R) are false. |
Assertion (A): | RQ of carbohydrates on its complete oxidation is equal to 1. |
Reason (R): | During the complete oxidation of carbohydrates, equal amounts of CO2 and O2 are evolved and consumed, respectively. |
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. | Both (A) and (R) are false. |
Assertion (A): | Oxidation of one molecule of FADH2 gives rise to three molecules of ATP. |
Reason (R): | The continued oxidation of acetyl CoA via the TCA cycle does not require the continued replenishment of oxaloacetic acid. |
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. | Both (A) and (R) are false. |
Assertion (A): | Fermentation takes place under anaerobic conditions in prokaryotes only. |
Reason (R): | In oxidative phosphorylation, water is the ultimate acceptor of electrons. |
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. | Both (A) and (R) are False. |