Glycogenolysis is best described by which of the following statements:

Bifunctional enzymes(two enzymatic activities present on a single protein) involve : Debranching enzyme Glucan transferase . (Option c) -(Option a)- Glycogenolysis - cleaving alpha(1 - 4) bonds, not b (1- 4) bonds. -(Option b) -requires activation of glycogen phosphorylase , not glycogen synthase -(Option d)- It requires activation (not inactivation )of phosphorylase kinase