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Q. No.The ratio of carbon dioxide fixation between C4 plants and C3 plants is :
1.
2:1
2.
2: 3
3.
1:1
4.
1:2
Subtopic: Â Dark Reaction : Calvin Cycle |Â C4 Cycle (Hatch & Slack Pathway) |
 57%
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When one CO2 molecule is fixed as one molecule of triose phosphate, which of the following photochemically made, high energy chemical intermediates are used in the reduction phase?
1. 1 ATP + 1 NADPH
2. 1 ATP + 2 NADPH
3. 2 ATP + 1 NADPH
4. 2 ATP + 2 NADPH
1. 1 ATP + 1 NADPH
2. 1 ATP + 2 NADPH
3. 2 ATP + 1 NADPH
4. 2 ATP + 2 NADPH
Subtopic: Â Dark Reaction : Calvin Cycle |
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Identify the correct statements regarding chemiosmotic hypothesis:
Choose the correct answer from the options given below:
| (a) | Splitting of the water molecule takes place on the inner side of the membrane. |
| (b) | Protons accumulate within the lumen of the thylakoids. |
| (c) | The primary acceptor of electrons transfers the electrons to an electron carrier. |
| (d) | NADP reductase enzyme is located on the stroma side of the membrane. |
| (e) | Protons increase in number in stroma. |
| 1. | (a), (b) and (e) | 2. | (a), (b) and (d) |
| 3. | (b), (c) and (d) | 4. | (b), (c) and (e) |
Subtopic: Â Chemiosmotic hypothesis |
 76%
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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%
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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 |
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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%
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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%
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The reaction centre in PS II has an absorption maxima at:
| 1. | 780 nm | 2. | 680 nm |
| 3. | 700 nm | 4. | 660 nm |
Subtopic: Â Light Reactions |
 90%
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How many ATP and NADPH2 are required for the synthesis of one molecule of glucose during Calvin cycle?
| 1. | 18 ATP and 16 NADPH2 |
| 2. | 12 ATP and 12 NADPH2 |
| 3. | 18 ATP and 12 NADPH2 |
| 4. | 12 ATP and 16 NADPH2 |
Subtopic: Â Dark Reaction : Calvin Cycle |
 89%
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Which of the following combinations is required for chemiosmosis?
| 1. | Proton pump, electron gradient, NADP synthase. |
| 2. | Membrane, proton pump, proton gradient, ATP synthase. |
| 3. | Membrane, proton pump, proton gradient, NADP synthase |
| 4. | Proton pump, electron gradient, ATP synthase |
Subtopic: Â Chemiosmotic hypothesis |
 80%
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