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Question

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


Solution

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 chlto 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.

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