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Q. No.Which of the following replaces the electrons removed from the reaction center chlorophyll-A molecule of the photosystem I in non-cyclic photophosphorylation?
1. The light harvesting complex of PS-I
2. Water
3. PS-II
4. NADPH
1. The light harvesting complex of PS-I
2. Water
3. PS-II
4. NADPH
Subtopic: Light Reaction: Photophosphorylation |
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Consider the given two statements
| Assertion (A): | In C4 plants, photorespiration does not occur. |
| Reason (R): | Rubisco in C4 plants does not have oxygenase activity. |
| 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, (R) is False. |
| 4. | (A) is False, (R) is False. |
Subtopic: Photorespiration |
From NCERT
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Who discovered that plants in the presence of light produce a gas that supports combustion, which is part of the process of photosynthesis?
1. Jan Ingenhousz
2. Joseph Priestley
3. Melvin Calvin
4. Robin Hill
1. Jan Ingenhousz
2. Joseph Priestley
3. Melvin Calvin
4. Robin Hill
Subtopic: Historical View: Experiments |
51%
From NCERT
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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 |
58%
From NCERT
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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 |
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 |
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From NCERT
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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 |
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From NCERT
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Consider the given two statements:
| 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. |
Subtopic: Factors Affecting Photosynthesis |
60%
From NCERT
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What is necessary for the reduction of NADP+ to NADPH + H+?
1. Only electrons
2. Only protons
3. Electrons and protons
4. Water molecules
1. Only electrons
2. Only protons
3. Electrons and protons
4. Water molecules
Subtopic: Dark Reaction : Calvin Cycle |
60%
From NCERT
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Subtopic: Dark Reaction : Calvin Cycle |
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