Put the following steps of the light reactions in the correct order:

1. Light excites an electron from photosystem I.
2. Light excites an electron from photosystem II.
3. Electrons reduce NADP+ to NADPH.
4. Electrons pass through an electron transport chain, which generates a H+ gradient used to make ATP.

A) 1, 2, 3, 4
B) 1, 4, 2, 3
C) 2, 4, 1, 3
D) 2, 3, 1, 4


Answer: C

Biology & Microbiology

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