AP 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: -Non-cyclic phosphorylation is a type of photophosphorylation in which flow of electrons is non-cyclic. It results in the production of ATP and NADPH. It involves both Photosystem I and Photosystem II.