Assertion(A): Plants photosynthesise during the day, whereas they respire at night.
Reason(R): Photosynthesis can occur in the presence of sunlight whereas respiration cannot.

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:  Introduction | Light Reaction: Electron Transport |
Level 3: 35%-60%

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Assertion(A): Mutant plants that are not able to carry out cyclic electron flow do not grow well in intense light conditions.
Reason(R): Cyclic electron flow may be photoprotective.
 
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: Electron Transport |
 55%
Level 3: 35%-60%

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Heme and iron-sulfur complexes in photosynthesis:

1. act as reducing agents
2. act as oxidizing agents
3. both oxidize and reduce during electron transport
4. are needed only in respiration but not in photosynthesis


 

Subtopic:  Light Reaction: Electron Transport |
 57%
Level 3: 35%-60%

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