Question

During cyclic photophosphorylation proton gradient established by

• A. $PQ$ mediated $H^{+}$ transfer
• B. Photolysis of $H_{2}O$
• C. $NADP$ reductase mediated withdrawal of $H^{+}$
• D. All of the above

Answer 1

The correct option is A $PQ$ mediated $H^{+}$ transfer

The proton gradient produced by proton pumping during the electron transport chain is used to synthesize ATP. Protons flow down their concentration gradient into the matrix through the membrane protein ATP synthase, causing it to spin & catalyze the conversion of ADP to ATP.

So, the correct option is 'PQ mediated H+ transfer'.