Question

Which of the following are true of the enzyme glycogen phosphorylase?  Select any/all answers that apply.

	A.	its activity is dynamically regulated by phosphorylation/dephosphorylation
	B.	it utilizes glucose 6-phosphate as a substrate
	C.	it generates glucose 6-phosphate as a product
	D.	it utilizes inorganic phosphate as a substrate
	E.	it catalyzes the hydrolytic cleavage of α(1->4) bonds

Answer 1

All options are correct except option c.

Reason:

Glycogen phosphorylase is an enzyme that breaks up glycogen into glucose.

option a : the enzyme activity is regulated by phosphorylation

option b: for proper metabolism, the glucose 6-phosphate is reuiqred as starting material.

option d: Inorganic phosphate is required to initiate the reaction, other wise the enzyme will not work.

option e: the enzyme spilts linkage between carbon 1 and carbon 4, thus hydrolytic cleavage of α(1->4) bonds