Cells regulate their level of activity by regulating the amount of proteins present in the cell at any given time, so an up regulation of enzymes would be expected to
A) increase the cell's response that is produced by the reaction catalyzed by the enzyme.
B) decrease the level of productivity of chemical reactions that rely on them.
C) have no effect on the rate of reactions catalyzed by the enzymes.
D) decrease the rate of reactions catalyzed by the enzymes.
E) both decrease the level of productivity of chemical reactions that rely on them and decrease the rate of reactions catalyzed by the enzymes.

Question

Quizplus · Accepted Answer

An up regulation of enzymes will increase the amount of protein present in the cell, which will in turn lead to an increase in the cell's response that is produced by the reaction catalyzed by the enzyme. This means that the rate of reactions catalyzed by the enzymes will increase, instead of decreasing or having no effect on the reactions.

Cells Regulate Their Level of Activity by Regulating the Amount