Biology NEET Full Syllabus Mock Test 180 Questions New Syllabus Mock Test - 8 PCB Single Correct MCQ
Published on: August 21, 2026

Which one of the following is incorrect about the activities associated with PS-I and PS-II in non-cyclic photophosphorylation?

A
Water is oxidised in PS - II, but not in PS - I.
B
Photons (light) are needed to activate both PS - I and PS-II.
C
Photolysis of water, formation of ATP + NADPH + occur.
D
Production of is associated with PS - II, but not with PS - I.

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Photosystem (PS) - I and II are two pigments system of light reaction. Non-cyclic photophosphorylation is the light requiring part of photosynthesis in higher plants, in which an electron donor is required, and oxygen is produced as a waste product. It consists of two photoreactions, resulting in the synthesis of ATP and . The hydrogen needed for the reduction of NADP (nicotinamide adenine dinucleotide phosphate) is made available from the breakdown of water.

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