Which statement describes the functioning of photosystem II?
A) Light energy excites electrons in the thylakoid membrane electron transport chain.
B) Photons are passed along to a reaction-center chlorophyll.
C) The P680 chlorophyll donates a pair of protons to NADP?, which is thus converted to NADPH.
D) The electron vacancies in P680? are filled by electrons derived from water.
E) The splitting of water yields molecular carbon dioxide as a by-product.
Answer: D
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