NEET BIOLOGY

Detailed explanation-1: -Cyclic photophosphorylation happens only in the photosystem I but non-cyclic photophosphorylation occurs in both the photosystems I and II. In the cyclic photophosphorylation, only ATP is produced, whereas, in the non-cyclic photophosphorylation both NADPH and ATP are produced.

Detailed explanation-2: -Solution : Cyclic photophosphorylation involves only the PS I and this process takes place in the stroma lamella membrane, which lacks PS II and NADP reductase enzyme. Thus, it results only in the synthesis of ATP and not to NADPH + ‘ H(+)’.

Detailed explanation-3: -In cyclic photophosphorylation, the combination between electrons and protons does not occur. NADPH is not produced in cyclic photophosphorylation.

Detailed explanation-4: -Non-Cyclic photophosphorylation produces 1 ATP and 2 NADPH2 molecules.

Detailed explanation-5: -In non-cyclic photophosphorylation the photolysis of water produces electrons that generate a proton motive force which is used to produce ATP, the electrons finally being used to reduce NADP+ to NADPH.