Electrons which get excited in PS-I must be r | vedclass

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(B) In the light reaction of photosynthesis,electrons excited in $PS-I$ are used to reduce $NADP^+$ to $NADPH + H^+$. To maintain the continuous flow

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$H_2O$

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(B) In the light reaction of photosynthesis,electrons excited in $PS-I$ are used to reduce $NADP^+$ to $NADPH + H^+$. To maintain the continuous flow of electrons,$PS-I$ receives electrons from $PS-II$ via the electron transport chain. $PS-II$ itself gets its electrons from the photolysis (splitting) of $H_2O$. Therefore,the ultimate source of electrons for $PS-I$ is $H_2O$.

Electrons which get excited in $PS-I$ must be replaced. These replacements ultimately come from

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