P680 is the name given to which structure?
AThe primary electron acceptor molecule
BThe cytochrome complex of the chain
CThe reaction centre of photosystem II
DThe reaction centre of photosystem I
Answer & Solution
Correct answer: C. The reaction centre of photosystem II
1. P680 is the reaction centre of photosystem II.
2. It delivers its high-energy electrons one at a time to the primary electron acceptor.
3. From there they travel through the chain to photosystem I.
4. P700 is the reaction centre of photosystem I, so the two numbers must be kept apart.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 8 "Photosynthesis", section 8.2 The Light-Dependent Reactions of Photosynthesis_
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