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  4. The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is

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Q. The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is

AIPMTAIPMT 2007Photosynthesis in Higher Plants

Solution:

Type I photosystems use ferredoxin like iron- sulphur cluster proteins as terminal electron acceptors, while type II photosystems ultimately shuttle electrons to a quinone terminal electron acceptor. One has to note that both reaction centres types are present in chloroplasts of plants and cyanobacteria, working together to form an unique photosynthetic chain able to extract electrons from water, evolving oxygen as a byproduct.