How many molecules of water should be photoly | vedclass

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(D) In the light-dependent reaction of photosynthesis,the photolysis of water occurs to provide electrons for the electron transport chain. The reacti

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(D) In the light-dependent reaction of photosynthesis,the photolysis of water occurs to provide electrons for the electron transport chain. The reaction is represented as: $2H_2O \rightarrow 4H^+ + 4e^- + O_2$. To produce one molecule of $NADPH_2$ (or $NADPH$),two electrons are required $(NADP^+ + 2e^- + 2H^+ \rightarrow NADPH + H^+)$. Since the photolysis of one $H_2O$ molecule releases two electrons,the photolysis of one $H_2O$ molecule provides the two electrons necessary to reduce one $NADP^+$ to $NADPH$. Therefore,$1$ molecule of water is photolysed to form one $NADPH_2$ molecule.

How many molecules of water should be photolysed to form one $NADPH_2$ molecule?

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