- 1(current)
Q. No.Consider the two statements:
| Assertion(A): | The protons or hydrogen ions that are produced by the splitting of water accumulate within the lumen of the thylakoids. |
| Reason(R): | The primary accepter of electrons, which is located towards the outer side of the membrane, transfers its electron not to an electron carrier but to an H carrier. |
| 1. | (A) is True but (R) is False |
| 2. | Both (A) and (R) are True and (R) explains (A) |
| 3. | Both (A) and (R) are True but (R) does not explain (A) |
| 4. | Both (A) and (R) are False |
Subtopic: Chemiosmotic hypothesis |
62%
From NCERT
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The NADP reductase enzyme is located:
| 1. | within the thylakoid membrane |
| 2. | on the stroma side of the thylakoid membrane |
| 3. | on the lumen side of the thylakoid membrane |
| 4. | in the thylakoid lumen |
Subtopic: Chemiosmotic hypothesis |
75%
From NCERT
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Regarding the thylakoid membrane:
| I: | Plastoquinone is located within the membrane |
| II: | Plastocyanin is located on the inner lumen side of the membrane |
| III: | NADP reductase is located on the stroma side of the membrane |
| 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: Chemiosmotic hypothesis |
63%
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Chemiosmosis in chloroplasts is possible because of:
| 1. | establishment of a proton gradient across the thylakoid membrane. |
| 2. | diffusion of electrons through the ATP synthase. |
| 3. | osmosis of water from thylakoid to stroma. |
| 4. | presence of large amount of oxygen in the stroma. |
Subtopic: Chemiosmotic hypothesis |
91%
From NCERT
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Consider the two statements:
| Assertion(A): | Breakdown of proton gradient across the thylakoid membrane leads to the synthesis of ATP. |
| Reason(R): | The gradient is broken down due to the movement of protons across the membrane to the stroma through the transmembrane channel of the CF0 of the ATP synthase. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Chemiosmotic hypothesis |
From NCERT
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In photosynthesis, ATP synthesis is linked to the development of a proton gradient across a membrane. The protons are accumulated in:
1. the inter-membrane space
2. thylakoid space
3. stroma
4. cytosol
1. the inter-membrane space
2. thylakoid space
3. stroma
4. cytosol
Subtopic: Chemiosmotic hypothesis |
78%
From NCERT
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Chemiosmosis does not require:
1. a membrane leaky to protons
2. a proton pump
3. a proton gradient
4. ATP synthase
1. a membrane leaky to protons
2. a proton pump
3. a proton gradient
4. ATP synthase
Subtopic: Chemiosmotic hypothesis |
92%
From NCERT
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To establish a proton gradient across the thylakoid membrane, the protons are provided by:
| 1. | Glucose | 2. | Chlorophyll |
| 3. | Membrane proteins | 4. | Water |
Subtopic: Chemiosmotic hypothesis |
67%
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The ATP synthase consists of two parts where:
| 1. | is a transmembrane channel and protrudes out towards stroma |
| 2. | is a transmembrane channel and protrudes out towards stroma |
| 3. | is a transmembrane channel and protrudes out towards lumen of thylakoid |
| 4. | is a transmembrane channel and protrudes out towards lumen of thylakoid |
Subtopic: Chemiosmotic hypothesis |
78%
From NCERT
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Consider the given two statements:
| Statement I: | CF1 particle of ATP synthase makes ATP molecules. |
| Statement II: | CF1 particle of ATP synthase is embedded in the thylakoid membrane and forms a transmembrane channel that carries out facilitated diffusion of protons across the membrane. |
| 1. | Both Statement I and Statement II are correct |
| 2. | Both Statement I and Statement II are incorrect |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
Subtopic: Chemiosmotic hypothesis |
68%
From NCERT
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