The reaction catalyzed by which enzyme in the Calvin cycle is unlikely to be a regulatory step?
A)Phosphoglycerate kinase.
B)Triose phosphate isomerase.
C)Phosphoribokinase.
D)Rubisco.

Question

Quizplus · Accepted Answer

Triose phosphate isomerase, which catalyzes a near-equilibrium reaction in the Calvin cycle, is less likely to be a regulatory step compared to enzymes like Rubisco, which catalyzes the rate-limiting step of CO2 fixation, or enzymes involved in phosphorylation steps that are often points of regulation.

The Reaction Catalyzed by Which Enzyme in the Calvin Cycle