The role of cAMP when it acts as an intracellular mediator in cells is to
A) bind to and activate protein kinase.
B) directly activate genes in the nucleus to produce mRNA by binding to DNA.
C) directly activate structural enzymes in the cytoplasm of the target cell.
D) catalyze a cascade reaction that ultimately activates genes on the DNA.
E) control levels of calcium in the cell.

Question

Quizplus · Accepted Answer

Cyclic AMP (cAMP) acts as a second messenger in cells, where it binds to and activates protein kinase A (PKA). This activation leads to the phosphorylation of various proteins, thereby altering their activity and triggering cellular responses.

The Role of CAMP When It Acts as an Intracellular