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Q. No.Match the following scientists with their contributions to the study of photosynthesis:
Column A
Column B
1.
Priestley
A.
Proposed that water is split in the process of photosynthesis.
2.
Engelmann
B.
Demonstrated that oxygen is produced from plants exposed to light.
3.
Van Niel
C.
Used a prism to show that different wavelengths of light affect oxygen production differently.
4.
Ingenhousz
D.
Discovered that plants release oxygen.
Options:
1.
1-D, 2-B, 3-C, 4-A
2.
1-B, 2-D, 3-A, 4-C
3.
1-D, 2-C, 3-A, 4-B
4.
1-C, 2-A, 3-B, 4-D
Subtopic: Historical View: Experiments |
86%
From NCERT
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Which component is not directly involved in the light reactions of photosynthesis?
1. Chlorophyll
2. Oxygen
3. ATP synthase
4. RuBisCO
1. Chlorophyll
2. Oxygen
3. ATP synthase
4. RuBisCO
Subtopic: Light Reactions :1 |
73%
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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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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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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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Which of the following correctly outlines the steps of the Z-scheme in photosynthesis?
| 1. | Light absorption, electron excitation, electron transport, ATP synthesis. |
| 2. | Carbon fixation, electron excitation, ATP synthesis, NADPH formation. |
| 3. | Electron excitation, light absorption, ATP synthesis, oxygen evolution. |
| 4. | ATP synthesis, light absorption, carbon fixation, electron transport. |
Subtopic: Light Reaction: Electron Transport |
87%
From NCERT
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What is the difference between action spectrum and absorption spectrum in photosynthesis?
| 1. | The action spectrum shows wavelengths used for oxygen evolution, while the absorption spectrum shows wavelengths that chlorophyll absorbs. |
| 2. | The action spectrum measures the rate of photosynthesis at different wavelengths, while the absorption spectrum measures the rate of respiration. |
| 3. | Both spectrums measure the same wavelengths of light used in photosynthesis. |
| 4. | The absorption spectrum indicates the overall health of the plant, whereas the action spectrum does not. |
Subtopic: Chloroplast Structure | Photosynthetic Pigments |
74%
From NCERT
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Consider the given two statements:
| Assertion (A): | Chemiosmosis is crucial for ATP synthesis in mitochondria. |
| Reason (R): | Chemiosmosis is a part of oxidative phosphorylation |
| 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: Chemiosmotic hypothesis |
From NCERT
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The cell type in which the Calvin cycle takes place in C3 and C4 plants respective are:
| 1. | Mesophyll; Bundle sheath |
| 2. | Bundle sheath; Mesophyll |
| 3. | Mesophyll; Mesophyll |
| 4. | Bundle sheath; Bundle sheath |
Subtopic: Dark Reaction : Calvin Cycle |
89%
From NCERT
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Consider the given two statements:
| Assertion (A): | In C4 plants, photorespiration does not occur. |
| Reason (R): | They have a mechanism that increases the concentration of carbon dioxide at the site of RuBisCO. |
| 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. | (A) is False but (R) is True |
Subtopic: C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
87%
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