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Question
Which statement describes the functioning of photosystem II?
Options:
A .  Light energy excites electrons in the electron transport chain in a photosynthetic unit.
B .  The excitation is passed along to a molecule of P700 chlorophyll in the photosynthetic unit.
C .  The P680 chlorophyll donates a pair of protons to NADPH, which is thus converted to NADP+
D .  The electron vacancies in P680 are filled by electrons derived from water.
Answer: Option D
:
D
When light falls in photosystem II, electrons get excited and are transported through an electron transport chain to photosystem I. Water is split, oxygen is released and electrons are transferred to photosystem II.
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