The flow of material through a reaction pathway usually depends on ________.
A)control at several steps in the pathway
B)control of the first step of the pathway
C)covalent modification of the enzyme that catalyzes the reaction
D)feed-forward activation

Question

Quizplus · Accepted Answer

The flow of material through a reaction pathway usually depends on control at several steps in the pathway. This means that multiple steps along the pathway can affect the overall rate of the reaction and the amount of product that is ultimately produced. By having control at several steps, the cell can more tightly regulate the pathway and ensure that the appropriate amount of product is produced. Choices B, C, and D may also have some impact, but they are not as comprehensive or as central to the regulation of the pathway as control at multiple steps.

The Flow of Material Through a Reaction Pathway Usually Depends