Question

The path of an electron during the light reactions of photosynthesis it is best described this way:

PS I → ETC I → PS II → ETC II → water → NADPH

water → PSII → ETC II → PS I → ETC I → NADPH

ETC I → PS I → NADPH → ETC II → PS I → water

PS II → ETC II → PS I → ETC I → NADPH → water

Answer 1

Answer is option b.

The path of electron flow during photosynthesis,first the source of electron is water then it is moved through PSII and then PS l after that it goes ETC I and atlast the electron acceptor is NADPH.

So,option a,c and d are not correct.

The above mentioned sequence matches with option b.

Hence,option b is correct.