How does each photoexcited electron pass from PS2 to PS1?
Correct answer: A. ETC
- A. ETC
- B. Chemiosmosis
- C. Photolysis
- D. Photosynthesis
Explanation
Light excites electrons in chlorophyll P680 in PSII.These high-energy electrons are transferred to the primary electron acceptor of PSII.The electrons pass through a series of electron carriers in the ETC, including:Plastoquinone (PQ)Cytochrome b6f complex (which pumps protons into the thylakoid lumen, aiding ATP synthesis)Plastocyanin (PC) (which transfers electrons to PSI)Excitation in Photosystem I (PSI)The electrons arrive at chlorophyll P700 in PSI, where they get re-excited by light.The energized electrons are then passed to ferredoxin (Fd) and finally used to reduce NADP+ to NADPH.
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