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Q. No.Which out of the following statements is incorrect?
1.
Grana lamellae have both PS I and PS II
2.
Cyclic photophosphorylation involved both PS I and PS II
3.
Both ATP and NADPH + H+ are synthesised during non-cyclic photophosphorylation
4.
Stroma lamellae lack PS II and NAP reductase
Subtopic: Light Reaction: Electron Transport |
80%
From NCERT
NEET - 2023
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Given below are two statements :
In the light of the above statements, choose the most appropriate answer from the options given below:
1. Statement I is correct but statement II is incorrect
2. Statement I is incorrect but statement II is correct
3. Both statement I and statement II are correct
4. Both statement I and statement II are incorrect
| Statement I: | RuBisCO is the most abundant enzyme in the world. |
| Statement II: | Photorespiration does not occur in C4 plants. |
1. Statement I is correct but statement II is incorrect
2. Statement I is incorrect but statement II is correct
3. Both statement I and statement II are correct
4. Both statement I and statement II are incorrect
Subtopic: Photorespiration |
88%
From NCERT
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Given below are two statements:
| Assertion (A): | It was inferred from the experiments performed on green & purple sulphur bacteria that the O2 evolved by green plants comes from H2O. |
| Reason (R): | Purple and green sulphur bacteria release sulphur or sulphate as oxidation product during photosynthesis. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Historical View: Experiments |
60%
From NCERT
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Given below are two statements:
| Assertion (A): | Synthesis of ATP and NADPH during photophosphorylation is referred as light reaction. |
| Reason (R): | In plants, ATP and NADPH synthesis is directly driven by light. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Light Reaction: Photophosphorylation |
From NCERT
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Given below are two statements:
| Assertion (A): | In PS I, the reaction centre chlorophyll 'a' has an absorption peak at 700 nm. |
| Reason (R): | PS II reaction centre is called P 680. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Photosystems |
83%
From NCERT
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Given below are two statements:
| Assertion (A): | The protons produced by splitting of H2O get accumulated within the lumen of the thylakoids. |
| Reason (R): | Splitting of water takes place on the inner side of the thylakoid membrane. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Chemiosmotic hypothesis |
83%
From NCERT
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Given below are two statements:
| Assertion (A): | Protons are transported across the thylakoid membrane when electrons move through the photosystems. |
| Reason (R): | The primary acceptor of electron, located towards the outer side of thylakoid membrane & transfers its electrons to an H carrier. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Chemiosmotic hypothesis |
65%
From NCERT
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Given below are two statements:
| Assertion (A): | Proton gradient is important during photosynthesis. |
| Reason (R): | Breakdown of proton gradient leads to release of energy. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Chemiosmotic hypothesis |
88%
From NCERT
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Given below are two statements:
| Assertion (A): | Biosynthetic pathway is also called as Calvin cycle. |
| Reason (R): | Melvin Calvin contributed to working out the complete biosynthetic pathway. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: WHERE ARE THE ATP AND NADPH USED |
74%
From NCERT
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Given below are two statements:
| Assertion (A): | Enzyme RuBisCO is called as RuBP Carboxylase oxygenase. |
| Reason (R): | RubisCo has both oxygenation and carboxylation activity. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Dark Reaction : Calvin Cycle |
91%
From NCERT
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