Question

1. electrons released from photosystem ii travel through the (i) __, where their energy is used to generate a proton gradient. the gradient is then used to power (ii) generation. finally, the electrons are re - energized in photosystem i and used to reduce (iii) __.

blank (i)
a. electron transport chain
b. calvin cycle
c. thylakoid lumen

blank (ii)
d. atp
e. nadph
f. glucose

blank (iii)
g. nadp+
h. oxygen
i. water

Explanation:

• In the light - dependent reactions of photosynthesis, electrons from Photosystem II pass through the electron transport chain. As electrons move through the electron transport chain, protons are pumped, creating a proton gradient.
• The proton gradient is used by ATP synthase to generate ATP (chemiosmosis).
• After passing through the electron transport chain, electrons go to Photosystem I. In Photosystem I, electrons are re - energized and then used to reduce \(NADP^{+}\) to \(NADPH\).

Answer:

A. Electron transport chain, D. ATP, G. \(NADP^{+}\)