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Q. No.Consider the given two statements:
Assertion (A):
The dark reactions of photosynthesis are temperature controlled
Reason (R):
The dark reactions of photosynthesis are enzyme catalyzed
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.
(A) is False, but (R) is True.
Subtopic: Factors Affecting Photosynthesis |
71%
From NCERT
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The NADP reductase enzyme:
| I: | is located on the stroma side of thylakoid membrane |
| II: | is the last enzyme in the transfer of electrons during photosynthesis from PS I to NADPH |
| 1. | Both I and II are correct |
| 2. | Both I and II are incorrect |
| 3. | I is correct |
| 4. | II is correct |
Subtopic: Dark Reaction : Calvin Cycle |
85%
From NCERT
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Consider the given two statements
| I: | When the intensity of sunshine is minimum, the chloroplasts in a mesophyll cell align themseleve parallel to wall of mesophyll cells. |
| II: | Thylakoids are membrane-bound compartments inside chloroplasts and cynobacteria. |
| 1. | Both I and II are correct |
| 2. | Both I and II are incorrect |
| 3. | I is correct |
| 4. | II is correct |
Subtopic: Chloroplast Structure |
71%
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Consider the given two statements:
| Assertion (A): | Green house crops such as tomatoes & bell pepper are allowed to grow in \(CO_2\) enriched atmosphere. This leads to higher yields |
| Reason (R): | Tomato and Bell pepper are \(C_4\) plants |
| 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. | (A) is False, but (R) is True. |
Subtopic: Factors Affecting Photosynthesis |
76%
From NCERT
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In Kranz anatomy, bundle sheath cells are characterized by:
| I: | presence of large number of chloroplasts |
| II: | thin wall, highly permeable to gas exchange |
| III: | no intercellular spaces |
| 1. | Only I and II are correct |
| 2. | Only I and III are correct |
| 3. | Only II and III are correct |
| 4. | I, II and III are correct |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
91%
From NCERT
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Stroma lamellae in chloroplasts lack
| I: | PS I |
| II: | NADP reductase |
| 1. | I and II are correct |
| 2. | I and II are incorrect |
| 3. | Only I is correct |
| 4. | Only II is correct |
Subtopic: Light Reaction: Photophosphorylation |
80%
From NCERT
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Consider the given two statements:
| Assertion (A): | Photosynthesis is vital for climate process |
| Reason (R): | Photosynthesis captures carbon dioxide from the air |
| 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. | (A) is False, but (R) is True. |
Subtopic: Introduction |
92%
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How does PEPcase differ from RuBisCO in function?
| 1. | PEPcase is more efficient at carbon fixation at low CO₂ concentrations than RuBisCO. |
| 2. | PEPcase fixes oxygen instead of carbon dioxide, unlike RuBisCO. |
| 3. | PEPcase catalyzes the dark reactions, while RuBisCO catalyzes the light reactions. |
| 4. | RuBisCO requires a higher pH to function optimally compared to PEPcase. |
Subtopic: CAM Pathway |
87%
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 |
52%
From NCERT
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Consider the given two statements:
| Assertion (A): | Chlorophyll a is the primary pigment involved in photosynthesis. |
| Reason (R): | Chlorophyll a initiates the conversion of solar energy to chemical energy. |
| 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. | (A) is False but (R) is True. |
Subtopic: Chloroplast Structure |
77%
From NCERT
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