Which of the following statements is true with regard to light reaction of photosynthetic mechanism in plants

Options

A. Chlorophyll A occurs with peak absorption at 680 nm in photosystem I and at 700 nm in photosystem II
B. Magnesium and sodium ions are associated with photolysis of water molecules
C. `O_2` is evolved during cyclic photophosphorylation
D. Photosystems I and II are both involved in non–cyclic photophosphorylation

Answer

D

Explanation

Non-cyclic electron transport involves the participation of both PSI and PSII. The first step is photooxidation of water resulting splitting of water into `H^+, e^-` and release of `O_2`, it is concerned with the reduction of `NADP^+` and production of ATP.