Kinases and phosphatases are essential in the cell because they
A)sense short poly A tails in mRNA as a signal to degrade the mRNA.
B)are enzymes that destroy damaged proteins.
C)help turn proteins "on and off" through changes in phosphorylation status.
D)destroy second messengers, thereby turning off a signal transduction pathway.
E)all of the above

Question

Quizplus · Accepted Answer

Kinases add phosphate groups to proteins (phosphorylation), and phosphatases remove them (dephosphorylation), thus regulating protein activity and function.

Kinases and Phosphatases Are Essential in the Cell Because They