Q. I. Water is oxidised in PS-I not in PS-II II. Light is needed for both PS-I and PS-II III. Due to photolysis of water, formation of ATP and NADPH occurs IV. Production of NADPH and $H^{+}$ is associated with PS-II not PS-I Identify the true statement and select the correct option

A) I and II
B) II and III
C) I and IV
D) II and IV
Explanation

Water is oxidised by PS-II, the reaction is $2H_{2}O \rightarrow 4H^{+} + O_{2} + 4e^{-}$ These electrons goes to the PS-I one by one through ETS (Electron Transport System) on reaching to the PS-I. They reduces $NADP^{+}$ to NADPH + $H^{+}$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.