Kinases and phosphatases are essential in the cell because they
A)help turn proteins "on and off" through changes in phosphorylation status.
B)are enzymes that destroy damaged proteins.
C)sense short poly-A tails in mRNA as a signal to degrade the mRNA.
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, while phosphatases remove them. This process, known as phosphorylation, can activate or deactivate a protein, which is crucial for regulating cellular processes such as metabolism and gene expression.

Kinases and Phosphatases Are Essential in the Cell Because They