Q. No.The pathway:
1. is common to all plants
2. takes place in mesophyll cells in plants
3. takes place in bundle sheath cells in plants
4. does not take place in CAM plants
1. is common to all plants
2. takes place in mesophyll cells in plants
3. takes place in bundle sheath cells in plants
4. does not take place in CAM plants
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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 |
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The most common enzyme in the world is:
| 1. | PEP carboxylase | 2. | Pyruvate dehydrogenase |
| 3. | RuBisCO | 4. | Collagenase |
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The 2-carbon compound formed in photorespiration is:
| 1. | Acetyl CoA | 2. | Phosphoglycolate |
| 3. | Acetic acid | 4. | Ethanol |
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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. |
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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 |
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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 |
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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 |
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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 |
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