Question: Place the following events in the correct order for the two-photosystem light reactions. 1) Elect…

Place the following events in the correct order for the
two-photosystem light reactions.

1) Electrons are transferred to the b6F complex with concomitant
influx of protons into the thylakoid lumen.
2) Electrons are passed through to ferredoxin and then ultimately
to NADP⁺, reducing the latter to NADPH.
3) Electrons are transferred to plastoquinones, which serve as
intermediate electron transporters.
4) Light energy is absorbed by photosystem II, placing it in an
excited state, causing it to release electrons, which are replaced
by the oxidation of water to oxygen.
5) Electrons are transferred to photosystem I via plastocyanin.

a) 4-3-5-1-2

b) 4-3-1-5-2

c) 4-3-2-5-1

d) 3-4-2-5-1