Statement I: | At low light conditions, both C3 and C4 plants respond to high CO2 conditions. |
Statement II: | At high light intensities, both C3 and C4 plants show increase in the rates of photosynthesis. |
1. | Statement I is correct; Statement II is correct |
2. | Statement I is correct; Statement II is incorrect |
3. | Statement I is incorrect; Statement II is correct |
4. | Statement I is incorrect; Statement II is incorrect |
1. | Photosystem II (PS II), Cytochrome b6f complex, Photosystem I (PS I), and ATP synthase. |
2. | Photosystem I (PS I), Cytochrome b6f complex, Photosystem II (PS II), and ATP synthase. |
3. | Photosystem II (PS II), Photosystem I (PS I), Cytochrome b6f complex, and ATP synthase. |
4. | Photosystem I (PS I), Photosystem II (PS II), Cytochrome b6f complex, and ATP synthase. |
Assertion (A): | Photorespiration decreases the efficiency of photosynthesis in plants. |
Reason (R): | Carbon dioxide is released during photorespiration, which represents a loss of fixed carbon. |
1. | Both (A) and (R) are True and (R) correctly explains (A). |
2. | Both (A) and (R) are True and (R) does not correctly explain (A). |
3. | (A) is True; (R) is False |
4. | Both (A) and (R) are False |
Assertion (A): | The effect of water as a factor is more indirect rather than direct on photosynthesis. |
Reason (R): | Water is one of the reactants in the light reaction. |
1. | Both (A) and (R) are True and (R) correctly explains (A). |
2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Assertion(A): | The dark reactions of photosynthesis are temperature controlled. |
Reason (R): | The dark reactions of photosynthesis are enzymatic. |
1. | Both (A) and (R) are True and (R) correctly explains (A). |
2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
1. | are formed in mesophyll cells and transported to bundle sheath cells |
2. | are formed in bundle sheath cells and transported to mesophyll cells |
3. | are formed in mesophyll cells, get decarboxylated in mesophyll cells and the resultant three carbon molecule is transported to bundle sheath cells. |
4. | are formed in bundle sheath cells and get decarboxylated in mesophyll cells |
1. | may form several layers around the vascular bundles |
2. | are characterised by having only a few number of chloroplasts |
3. | have thin walls freely permeable to gaseous exchange |
4. | have large intercellular spaces. |
I: | are the products of the light dependent reactions of photosynthesis. |
II: | are used in the light independent reactions of photosynthesis. |