Question 5 of 10

The light reaction of photosynthesis can proceed along two alternative electron-flow routes through the photosystems, each yielding a different set of products. Evaluate the two statements below on these two routes.

• Statement I: Non-cyclic photophosphorylation involves both Photosystem I and Photosystem II acting in series and generates ATP, NADPH, and O₂.
• Statement II: Cyclic photophosphorylation involves only Photosystem I, produces only ATP with no NADPH or O₂ formed, and can occur in regions such as the stroma lamellae, which lack Photosystem II.