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Q. No.Production of ATP through phosphorylation in a eukaryotic cell can take place in:
I: Cytosol
II: Mitochondria
III: Chloroplasts
1. Only I
2. Only II and III
3. Only I and II
4. I, II and III
Subtopic: Chloroplast Structure |
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The reduction of NADP + to NADPH + H+ during non-cyclic photophosphorylation directly requires:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | electrons that come from water. |
| II: | protons that are removed from the stroma. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Light Reaction: Photophosphorylation | Light Reactions :1 | Light Reactions :2 | Light Reactions :3 | Light Reactions |
65%
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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 |
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Consider the given two statements:
| Assertion(A): | The enzyme that catalyses carboxylation of RuBP in Calvin cycle would be more correctly called RuBisCO rather than RuBP carboxylase. |
| Reason(R): | This enzyme also has an oxygenation activity apart from a carboxylase activity. |
| 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: Dark Reaction : Calvin Cycle |
91%
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What will not be true for C4 plants when compared to C3 plants?
1. They have a special type of leaf anatomy
2. They tolerate higher temperatures
3. They show a response to very low light intensities
4. They lack a process called photorespiration
1. They have a special type of leaf anatomy
2. They tolerate higher temperatures
3. They show a response to very low light intensities
4. They lack a process called photorespiration
Subtopic: Photorespiration | Factors Affecting Photosynthesis | Light Reactions :1 | Light Reactions :2 | Light Reactions :3 |
92%
From NCERT
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The site of production of NADPH and ATP in a plant cell is:
1. matrix of the mitochondria
2. cristae of the mitochondria
3. stroma of the chloroplast
4. thylakoid membranes of the chloroplast
1. matrix of the mitochondria
2. cristae of the mitochondria
3. stroma of the chloroplast
4. thylakoid membranes of the chloroplast
Subtopic: Chloroplast Structure | WHERE ARE THE ATP AND NADPH USED |
63%
From NCERT
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Regarding chemiosmotic ATP synthesis in the chloroplast:
1. Only I, II and III are correct
2. Only I, II and IV are correct
3. Only II, III and IV are correct
4. Only II and III are correct
| I: | There is a large number of hydrogen ions in the thylakoid space compared to the number in the stroma. |
| II: | Hydrogen ions diffuse through special channels called ATP synthase complex. |
| III: | ATP synthase complex splits ATP into ADP plus phosphate. |
| IV: | Hydrogen ions flow down their electrochemical gradient through the ATP synthase complex. |
2. Only I, II and IV are correct
3. Only II, III and IV are correct
4. Only II and III are correct
Subtopic: Light Reactions |
82%
From NCERT
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Organisms can be classified by how they obtain carbon and energy where:
| I: | Heterotrophs are organisms that obtain nutrients by consuming the carbon of other organisms |
| II: | Autotrophs are organisms that produce their own nutrients from the carbon of inorganic substances like carbon dioxide. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Historical View: Experiments |
91%
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 |
77%
From NCERT
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Identify the correct statements:
1. Only I
2. Only II and III
3. I, II and III
4. All are incorrect
| I: | Photosystem I (PS I) functions before Photosystem II (PS II) during the light reaction. |
| II: | In PS I, the reaction centre chlorophyll a has an absorption peak at 680 nm, hence is called P680. |
| III: | In PS II, the reaction centre chlorophyll a has absorption maxima at 700 nm, and is called P700. |
2. Only II and III
3. I, II and III
4. All are incorrect
Subtopic: Light Reactions :1 | Light Reactions :2 | Light Reactions :3 |
89%
From NCERT
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