Which of the following proteins exerts direct control over the glycogen synthesis and breakdown pathways when epinephrine stimulates glycogen conversion to glucose in liver cells?
A)glycogen phosphorylase
B)phosphorylase kinase
C)protein kinase A
D)cAMP phosphodiesterase
E)glycogen synthase

Question

Quizplus · Accepted Answer

Protein kinase A is activated by cAMP when epinephrine binds to its receptor, and it phosphorylates both glycogen synthase (inhibiting it) and phosphorylase kinase (activating it), thus controlling glycogen breakdown and synthesis.

Which of the Following Proteins Exerts Direct Control Over the Glycogen