Which enzyme is targeted by adrenaline to stimulate glycogen breakdown?

Explanation

Adrenaline activates glycogen phosphorylase, the key enzyme responsible for breaking down glycogen into glucose-1-phosphate during glycogenolysis. Glucokinase and hexokinase are involved in glucose phosphorylation, while glucose-6-phosphatase functions in gluconeogenesis and glycogenolysis but is not directly activated by adrenaline.