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Q. No.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%
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): | 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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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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There is a clear division of labor within the chloroplast. Which of the following will be true?
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
| A: | The membrane system is responsible for trapping the light energy and also for the synthesis of ATP and NADPH. |
| B: | In stroma, enzymatic reactions synthesize sugar, which in turn forms starch. |
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
Subtopic: Chloroplast Structure |
92%
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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Match the following scientists with their contributions to the study of photosynthesis:
Options:
| 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. |
| 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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Consider the given two statements:
| Assertion (A): | The primary acceptor of carbon dioxide in C3 plants is a 2-carbon compound. |
| Reason (R): | The first stable product of carbon dioxide fixation in C3 plants is a 3-carbon compound. |
| 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: Dark Reaction : Calvin Cycle |
87%
From NCERT
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