ATP by the enzyme ATP synthetase (CF1 Coupling Factor) in thylakoid membranes is:
A movement of electrons between photosystem II and photosystem IB oxidation of water
C oxidation of NADPH
D absorption of photons by chloroplast pigments
E higher concentration of H+ inside versus outside the thylakoid membranes
The concentration gradient resulting from photosynthetic electron transport drives protons through a channel of the CF1 ATP Synthase enzyme. This movement of protons from a region of high concentration (inner thylakoid space) to low concentration (stroma) activates the conversion of ADP and Pi to ATP.
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