A) cytochrome
B) iron-sulphur protein
C) ferredoxin
D) plastoquinone
Correct Answer: D
Solution :
The first acceptor of electrons from an excited chlorophyll molecule of photosystem-II is plastoquinone. PS-II is an extremely complex, highly organised transmembrane structure found in all chloroplasts that contains a water splitting complex, chlorophylls and carotenoid pigments, a reaction centre \[({{P}_{680}}),\] pheophytin and two quinones. It uses the energy of sunlight to transfer electrons from water to a mobile electron carrier in the membrane called plastoquinone. Plastoquinone. in turn, transfers electrons to \[cyt_{6}^{b},\]which feeds them into PS-I.
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