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 |
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Level 2: 60%+
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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 |
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |
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Level 2: 60%+
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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 |
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Level 1: 80%+
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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 |
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Level 2: 60%+
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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 |
 65%
Level 2: 60%+
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The oxygen evolving complex is associated with:
| 1. | PS I | 2. | PS II |
| 3. | Both 1 and 2 | 4. | Neither 1 nor 2 |
Subtopic: Â Light Reaction: Electron Transport |
 82%
Level 1: 80%+
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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 |
 74%
Level 2: 60%+
NEET - 2022
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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 :
| 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) |
 82%
Level 1: 80%+
NEET - 2022
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What is the role of large bundle sheath cells found around the vascular bundles in C4 plants?
| 1. | To protect the vascular tissue from high light intensity. |
| 2. | To provide the site for photorespiratory pathway. |
| 3. | To increase the number of chloroplast for the operation of Calvin cycle. |
| 4. | To enable the plant to tolerate high temperature. |
Subtopic: Â Question on C4 Pathway |
Level 3: 35%-60%
NEET - 2022
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The products of light reaction in photosynthesis are:
| 1. | ATP, NADPH and \(\text{O}_2\) |
| 2. | ATP, NADPH, \(\text{O}_2\) and \(\text{H}_2 \text{O}\) |
| 3. | ATP, NADPH and \(\text{H}_2 \text{O}\) |
| 4. | ATP, NADPH and \(\text{CO}_2\) |
Subtopic: Â Light Reaction: Electron Transport |Â Light Reactions |
 79%
Level 2: 60%+
NEET - 2022
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