The oxygen liberated during photosynthesis co | vedclass

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(B) The oxygen released during photosynthesis is derived from the photolysis of water.The reaction is: $2H_2O \rightarrow 4H^+ + O_2 + 4e^-$.When a ph

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Water

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(B) The oxygen released during photosynthesis is derived from the photolysis of water.The reaction is: $2H_2O \rightarrow 4H^+ + O_2 + 4e^-$.When a photon of light strikes the reaction center of $PS$ $II$,it excites an electron. To replace this electron,water molecules are split by an oxygen-evolving complex $(OEC)$ associated with $PS$ $II$. This process,known as photolysis,releases $H^+$ ions into the thylakoid lumen,electrons into the electron transport chain,and $O_2$ as a byproduct.

The oxygen liberated during photosynthesis comes from:

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