Question

in what order do the electrons move through the electron transport chain?
a) photosystem i - water - photosystem ii - nadph
b) water - photosystem ii - nadph - photosystem i
c) water - photosystem i - photosystem ii - nadph
d) water - photosystem ii - photosystem i - nadph

Explanation:

In the light - dependent reactions of photosynthesis, water is first split at photosystem II, releasing electrons. These electrons then move through an electron - transport chain to photosystem I. From photosystem I, the electrons are finally used to reduce NADP+ to NADPH.

Answer:

d) Water - photosystem II - photosystem I - NADPH