Assertion: The stromal thylakoids are rich in both PS I and PS II.
Reason: The granal membranes are rich in ATP synthetase.

Both reason and assertion are true and the reason is the correct explanation for the assertion.

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Both the reason and assertion are true but the reason is not the correct explanation of the assertion.

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Assertion is true but the reason is false.

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Both the assertion and reason are false.

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Solution

The correct option is D Both the assertion and reason are false.
The granal membranes are enriched in PS-II and LHC (Light harvesting centre), while there is little ATP synthetase. On the other hand, only a fraction of stromal thylakoids are rich in PS I and ATPase and poor in PS-II and LHC.

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