Assertion(A): Cyclic electron flow is the only photosynthetic mode of generating ATP for bundle sheath cells.
Reason(R): Bundle sheath cells contain PS I but no PS II.
 
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:  C4 Cycle (Hatch & Slack Pathway) |

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Both C4 and CAM pathways are regarded as compromises. The reason for this would be:

1. Both pathways lead to reduction of photosynthesis to enable water conservation.
2. To maintain high photosynthetic levels C4 compromises on water loss and CAM compromises on loss of carbon.
3. Both minimize photorespiration and optimize the Calvin cycle.
4. To maintain high photosynthetic levels CAM compromises on water loss and C4 compromises on loss of carbon.


 

Subtopic:  C4 Cycle (Hatch & Slack Pathway) | CAM Pathway |

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