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Q. No.What is necessary for the reduction of NADP+ to NADPH + H+?
1. Only electrons
2. Only protons
3. Electrons and protons
4. Water molecules
Subtopic: Dark Reaction : Calvin Cycle |
60%
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Subtopic: Dark Reaction : Calvin Cycle |
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How many of the given statements are correct?
1. 2
2. 3
3. 4
4. 5
| I: | The Hill reaction involves the reduction of NADP+ to NADPH. |
| II: | Photorespiration occurs in the chloroplast, peroxisome, and mitochondria. |
| III: | CAM plants store CO2 in the form of malate during the night. |
| IV: | The main purpose of photorespiration is to release CO2 for the Calvin cycle. |
| V: | PEP carboxylase is the primary enzyme for CO2 fixation in C4 plants. |
2. 3
3. 4
4. 5
Subtopic: Dark Reaction : Calvin Cycle | Photorespiration |
55%
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Consider the given two statements:
| Statement I: | High temperatures can lead to increased rates of photorespiration in C3 plants. |
| Statement II: | Photorespiration occurs because the enzyme RuBisCO has a higher affinity for CO2 than O2. |
| 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 |
Subtopic: Photorespiration |
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How many of the given statements are true?
1. 3
2. 4
3. 5
4. 6
| I: | C3 plants use the Calvin cycle to fix carbon dioxide directly into a three-carbon compound, 3-phosphoglycerate. |
| II: | C4 plants conduct their light-dependent reactions and Calvin cycle in the same cell type. |
| III: | Photosystem I primarily functions to generate ATP, while Photosystem II primarily functions to generate NADPH. |
| IV: | C4 plants separate carbon fixation and the Calvin cycle into two different types of cells to reduce photorespiration. |
| V: | Light-dependent reactions occur in the thylakoid membranes and involve the absorption of light to produce ATP and NADPH. |
| VI: | In C3 plants, photorespiration is promoted by high concentrations of oxygen, especially under high light intensity and temperature conditions. |
1. 3
2. 4
3. 5
4. 6
Subtopic: Questions on Calvin Cycle | Question on C4 Pathway | Questions on Photorespiration |
51%
From NCERT
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At low light conditions which of the following plants will respond to high carbon dioxide conditions?
1. Only A
2. Only B
3. Both A and B
4. Neither A nor B
| A: | C3 |
| B: | C4 |
2. Only B
3. Both A and B
4. Neither A nor B
Subtopic: Factors Affecting Photosynthesis |
58%
From NCERT
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Consider the given two statements:
Options:
| Assertion (A): | ATP synthesis in chloroplasts depends on a proton gradient. |
| Reason (R): | Protons build up in the space between the outer and inner chloroplast membrane during the light-dependent reactions. |
| 1. | Both (A) and (R) are True and (R) explains (A). |
| 2. | Both (A) and (R) are True but (R) does not explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Chemiosmotic hypothesis |
59%
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The difference in the effect of increasing carbon dioxide concentration on C3 and C4 plants is that:
| 1. | C3 plants show a higher rate of photosynthesis than C4 plants at low CO2 concentration |
| 2. | C3 plants show a higher rate of photosynthesis than C4 plants at high CO2 concentration |
| 3. | C3 plants' photosynthesis rate decreases at higher CO2 concentrations, unlike C4 plants |
| 4. | C4 plants are more efficient in photosynthesis at lower CO2 concentrations |
Subtopic: Factors Affecting Photosynthesis |
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Consider the given two statements:
| Assertion (A): | Chemiosmosis in chloroplasts is crucial for ATP synthesis. |
| Reason (R): | The movement of protons across the thylakoid membrane from the stroma into the thylakoid lumen drives ATP synthesis |
| 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 (R) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Chemiosmotic hypothesis |
57%
From NCERT
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Consider the given two statements;
| Statement I: | The action spectrum of photosynthesis overlaps completely with the absorption spectrum of chlorophyll a. |
| Statement II: | Accessory pigments like chlorophyll b, xanthophylls, and carotenoids widen the range of light wavelengths that can be utilized for 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 |
Subtopic: Pigments |
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