Question

Final acceptor of electrons in light reaction:

Hint:

Light reaction: Water → PSII → PSI → NADP+.
Final acceptor is always NADP+ forming NADPH.
Remember: Ferredoxin and Phacophytin are intermediate carriers.

Answer 1

1. In the light reaction of photosynthesis, electrons are passed through Photosystem II and Photosystem I.
2. Ferredoxin is an intermediate electron carrier.
3. NADP+ is the final acceptor of electrons in Photosystem I to form NADPH.
4. Phacophytin acts as primary electron acceptor in PSII, not final.
5. Hence, the final electron acceptor is NADP+. Correct answer is (4) NADP+.