It is believed that the ratio of cyclic electron transport to Z-scheme photosynthesis changes in response to metabolic demands. If a plant were actively synthesizing starch from the glucose produced, how would it alter these processes compared to a plant just performing the Calvin cycle to produce glucose?
A) More cyclic photophosphorylation, less Z-scheme.
B) More Z-scheme photosynthesis, less cyclic photophosphorylation.
C) No significant difference.
D) Impossible to predict from the information provided.

Question

Quizplus · Accepted Answer

Cyclic photophosphorylation produces additional ATP without producing NADPH, which is beneficial for processes like starch synthesis that require more ATP than NADPH. In contrast, the Z-scheme (non-cyclic photophosphorylation) produces both ATP and NADPH in equal amounts, which suits the Calvin cycle's needs for glucose production.

It Is Believed That the Ratio of Cyclic Electron Transport