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  • 1(current)
Q. No.
Given below are two statements: 
Assertion (A): During Calvin cycle, regeneration of RuBP is crucial for uninterrupted cycle.
Reason (R): RuBP in Calvin cycle acts as a CO2 acceptor.
  
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 |
 77%
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Given below are two statements: 
Assertion (A): Six molecules of CO2 and twelve molecules of NADPH + H+ and 18 ATP are used to form one hexose molecules.
Reason (R): Light reaction results in formation of ATP and NADPH2.
  
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.
  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Dark Reaction: Biosynthetic Phase | Dark Reaction : Calvin Cycle |
 79%
From NCERT
To view explanation, please take trial in the course.
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Hints
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Assertion(A): The proton gradient across the thylakoid membrane is very important for photosynthesis.
Reason(R): The breakdown of this gradient leads to the synthesis of ATP.

Choices for Assertions and reasons:
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. (A) is false, but (R) is true.


Subtopic:  Dark Reaction : Calvin Cycle |
 87%
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
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Assertion(A): For every CO2 molecule in the Calvin cycle, 3 molecules of ATP and 2 of NADPH are required.
Reason(R): It is probably to meet this difference in the number of ATP and NADPH used in the dark reaction that the cyclic phosphorylation takes place.

Choices for Assertions and reasons:
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. (A) is False but (R) is True.
Subtopic:  Dark Reaction : Calvin Cycle |
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
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