The electrons in the reaction centre of PS-I | vedclass

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(A) The electrons in the reaction centre of $PS-I$ are excited simultaneously with $PS-II$ $(P_{680})$.In the electron transport system $(ETS)$ of pho

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Excited simultaneously with $PS-II$

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(A) The electrons in the reaction centre of $PS-I$ are excited simultaneously with $PS-II$ $(P_{680})$.In the electron transport system $(ETS)$ of photosynthesis,the movement of electrons is downhill in terms of the oxidation-reduction or redox potential scale.The electrons released from $PS-II$ are passed through the electron transport chain to the pigments of $PS-I$.Simultaneously,the reaction centre of $PS-I$ $(P_{700})$ absorbs red light of wavelength $700 \; nm$,causing its electrons to become excited.These excited electrons are then transferred to another acceptor molecule with a greater redox potential and are eventually used to reduce $NADP^+$ to $NADPH + H^+$.

The electrons in the reaction centre of $PS-I$ are

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