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Question

Both PSII and PSI participate in

A
Cyclic photophosphorylation
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B
Non cyclic photophosphorylation
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C
Photorespiration
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D
None of the above
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Solution

The correct option is B Non cyclic photophosphorylation
There are two types of photosystems, namely photosystem I (PSI) and photosystem II (PSII).Both PSII and PSI participate in non-cyclic photophsphorylation. In non-cyclic photophosphorylation, electrons are obtained from water and passed through PSII and PSI before ending up in NADPH. It involves 4 basic steps, namely light absorption in PSII, ATP synthesis, light absorption in PSI and NADPH formation.
Thus, the correct answer is 'Non cyclic photophosphorylation.'

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