Question Detail
Question
Photosystem 2 occurs before photosystem 1
Correct Answer
Option A is the correct answer.
Detailed Explanation
True. In the light-dependent reactions of photosynthesis, electrons flow through Photosystem II first, then through Photosystem I. They were numbered in order of discovery, not in the order they function.
Hint
Which photosystem was discovered first, and which one does the electron flow through first?