Question

where does the electron flow that we measure with dcpip originate?
a) photosystem ii
b) photosystem i
c) cytochrome
d) atp - synthase

Explanation:

DCPIP is used to measure electron flow in the light-dependent reactions of photosynthesis, specifically acting as an electron acceptor that intercepts electrons from the electron transport chain after Photosystem II. The initial source of these electrons (replaced by splitting water in Photosystem II) originates from Photosystem II itself.

Answer:

a) Photosystem II