Question

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

Answer 1

Photo-oxidation is therefore the process of oxidation which is caused by shining light on it. Often, light can be used to cause reactions to happen, such as oxidation. The term "photo" comes from "photon" which is light.Photo-oxidation of chlorophyll a means it absorbs light and kicks out a number of electrons.

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 acceptorplastotoquinone 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