Which of the following statements is true about the control of muscle glycogen phosphorylase?

It is allosterically activated by ATP

It is activated by phosphorylation by an active phosphorylase kinase

It is allosterically activated by cAMP

Normally it exists in active form

Which of the following statements is true about the control of muscle

1.	Which of the following statements is true about the control of muscle glycogen phosphorylase?
A.	It is activated by phosphorylation by an active phosphorylase kinase
B.	It is allosterically activated by ATP
C.	It is allosterically activated by cAMP
D.	Normally it exists in active form
Answer» B. It is allosterically activated by ATP