Q.

Electrons lost from PS-II are regained from

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a

oxygen

b

carbon dioxide

c

water

d

nitrogen oxide

answer is A.

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Detailed Solution

Electrons lost from PS-II are regained from water by involving Oxygen Evolving complex. This complex is made of a few proteins, four Mn2+ , Ca2+ and Cl- ions. This complex is associated with photosystem II and is present in the lumen side of the thylakoid. OEC is responsible for photolysis of water.

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