Final answer:
The false statement regarding cyclic flow of electrons during light reactions is that NADPH + H+ is synthesized, as it occurs only during non-cyclic photophosphorylation. So the correct answer is option C.
Step-by-step explanation:
The question refers to cyclic electron flow during the light reactions of photosynthesis, particularly in cyanobacteria. In cyclic flow, photosystem I (PSI) is involved, but photosystem II (PSII) is not. Electrons are excited in PSI, then cycle back through the electron transport system, and return to PSI, allowing for the generation of ATP.
However, NADPH is not produced in this process; NADPH is produced in non-cyclic photophosphorylation, where both PSI and PSII are involved.
Therefore, the statement that is false regarding the cyclic flow of electrons is that NADPH + H+ is synthesized, as NADPH is only produced during non-cyclic photophosphorylation.ATP synthesis takes place during cyclic flow of electrons, and NADPH + H⁺ is not synthesized.