Accessory pigments of photosynthesis in higher plants:
I:
include chlorophyll b, xanthophylls and carotenoids.
II:
absorb light and transfer electrons to chlorophyll a.
III:
protect chlorophyll a from photo-oxidation.
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: Â Pigments |
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What provides the electrons needed to replace those removed from photosystem II during non cyclic photophosphorylation?
| 1. | PS I | 2. | Oxygen |
| 3. | Water | 4. | Carbon dioxide |
Subtopic: Â Light Reaction: Electron Transport |
 85%
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The reducing power used in Calvin cycle for reduction of carbon dioxide is:
| 1. | NADH | 2. | NADPH |
| 3. | ATP | 4. | Water |
Subtopic: Â Dark Reaction : Calvin Cycle |
 65%
From NCERT
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When the ratio of carbon dioxide and oxygen in the vicinity of RuBisCO is 1, the affinity of the enzyme:
1. is nearly nil for oxygen
2. is about equal for both carbon dioxide and oxygen
3. is much greater for oxygen than carbon dioxide
4. is much greater for carbon dioxide than oxygen
1. is nearly nil for oxygen
2. is about equal for both carbon dioxide and oxygen
3. is much greater for oxygen than carbon dioxide
4. is much greater for carbon dioxide than oxygen
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |
 61%
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T.W. Engelmann:
| 1. | described a first action spectrum of photosynthesis |
| 2. | provided evidence for production of glucose when plants grow |
| 3. | showed that it is only the green parts of the plant that can release oxygen |
| 4. | first showed that oxygen evolved by the green plant comes from water, not from carbon dioxide |
Subtopic: Â Historical View: Experiments |
 89%
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In non-cyclic photo-phosphorylation:
| 1. | only PS I is functional |
| 2. | both photosystems work in series, first PS I and then PS II |
| 3. | only ATP synthesis takes place and NADPH is not synthesized |
| 4. | both ATP and NADPH are synthesized |
Subtopic: Â Light Reaction: Electron Transport |
 76%
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In Sorghum:
| 1. | Calvin cycle takes place in Mesophyll cells |
| 2. | Initial carboxylation reaction occurs in Bundle sheath cells |
| 3. | Number of carbon atoms in the primary carbon dioxide acceptor is 3 |
| 4. | PGA is the primary carbon dioxide fixation product |
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |Â C4 Plants Examples |
 63%
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Subtopic: Â Light Reaction: Electron Transport |
 81%
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Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis?
It involves:
It involves:
| 1. | Reduction of NADP to NADPH2 on the stroma side of the membrane |
| 2. | Breakdown of proton gradient |
| 3. | Breakdown of electron gradient |
| 4. | Movement of protons across the membrane to the stroma |
Subtopic: Â Chemiosmotic hypothesis |
 73%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below :
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
| Statement I: | The primary \(CO_2\) acceptor in \(C_4\) plants is phosphoenolpyruvate and is found in the mesophyll cells. |
| Statement II: | Mesophyll cells in \(C_4\) plants lack RuBisCO enzyme. |
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |
 80%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
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