Question

What is Photo oxidation? What prevents photo oxidation of chlorophyll a?

Answer 1

Photo -oxidation in chlorophyll a means release of electrons from Chlorophylla (PSII/P680) after absorption of a photon. It occurs during noncyclic photophosphorylation. The electron move from oxidised chla to electron acceptor plastotoquinone and then further to other electon acceptors making electron transport chain. The oxidised Chlorophyll a accepts electron from donor (H2O) and this results in synthesis of molecular oxygen from water.