The enzyme that begins the kinase cascade, activating glycogen degradation, is:
A) glycogen synthase.
B) phosphorylase kinase.
C) PKC.
D) PKA.
E) tyrosine kinase.

Question

Quizplus · Accepted Answer

PKA (Protein Kinase A) is the enzyme that initiates the kinase cascade leading to the activation of glycogen degradation. It is activated by cAMP in response to hormonal signals like adrenaline, which leads to the phosphorylation and activation of phosphorylase kinase, further promoting glycogen breakdown.

The Enzyme That Begins the Kinase Cascade, Activating Glycogen Degradation