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Q. No.In pathway, the 4-carbon compound transported to bundle sheath cells most commonly is:
1.
Glutamic acid
2.
Malic acid
3.
Oxaloacetic acid
4.
Fumaric acid
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
72%
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The most common enzyme in the world is:
| 1. | PEP carboxylase | 2. | Pyruvate dehydrogenase |
| 3. | RuBisCO | 4. | Collagenase |
Subtopic: Dark Reaction : Calvin Cycle |
95%
From NCERT
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The 2-carbon compound formed in photorespiration is:
| 1. | Acetyl CoA | 2. | Phosphoglycolate |
| 3. | Acetic acid | 4. | Ethanol |
Subtopic: Photorespiration |
85%
From NCERT
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Photorespiration is a wasteful process. Why is it so?
| 1. | The number of ATP molecules produced in the pathway is very low. |
| 2. | The number of NADPH molecules produced in the pathway is very low. |
| 3. | The synthesis of sugars in the pathway requires a large input of ATP energy. |
| 4. | There is neither synthesis of sugars, nor of ATP in the pathway. |
Subtopic: Photorespiration |
87%
From NCERT
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Identify the correctly matched rows:
| C3 | C4 | ||
| I: | Productivity | Low | High |
| II: | CO2 compensation point | Low | Low |
| III: | Temperature optimum | 20 – 250 C | 30 – 450 C |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
Subtopic: C4 Plants Examples |
79%
From NCERT
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Except for plants in shade or in dense forests, light is rarely a limiting factor in nature. This is because:
| 1. | Dark reactions do not depend on light |
| 2. | The rate of photosynthesis can be increased by higher carbon dioxide and lower temperatures even in low light conditions |
| 3. | Light saturation occurs at 10 % of full sunlight |
| 4. | Carbon fixation is independent of enzymes |
Subtopic: Factors Affecting Photosynthesis |
83%
From NCERT
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Which pigment acts directly to convert light energy to chemical energy ?
| 1. | Chlorophyll a | 2. | Chlorophyll b |
| 3. | Xanthophylls | 4. | Carotenoid |
Subtopic: Pigments |
91%
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Subtopic: Pigments |
59%
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The correct sequence of flow of electrons in the light reaction is
| 1. | PSII, plastoquinone, cytochromes, PS I, ferredoxin |
| 2. | PSI, plastoquinone, cytochromes, PS II, ferredoxin |
| 3. | PSI, ferredoxin, PS II, |
| 4. | PSI, plastoquinone, cytochromes, PS II, ferredoxin |
Subtopic: Light Reaction: Electron Transport |
92%
From NCERT
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The enzyme that is not found in a plant is
1. RuBP Carboxylase
2. PEP Carboxylase
3. NADP reductase
4. ATP synthase
Subtopic: Dark Reaction : Calvin Cycle |
86%
From NCERT
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