According to glycogen metabolism, which of the following statements is/are not true? I. Insulin results in dephosphorylation and subsequent activation ofglycogen synthase. II. cAMP is a second messenger that triggers an increase in glycogensynthesis. III. Release of epinephrine leads to increased glycogen breakdown. IV. Glucagon promotes glycogen breakdown. V. Glucose-6-phosphate is an allosteric inhibitor of .phosphorylase A) I and V B) III and V C) II only D) III and IV E) V only

Biochemistry
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ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
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Chapter1: Biochemistry: An Evolving Science
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According to glycogen metabolism, which of the following statements
is/are not true?

I. Insulin results in dephosphorylation and subsequent
activation ofglycogen synthase.

II. cAMP is a second messenger that triggers an increase in glycogensynthesis.

III. Release of epinephrine leads to increased glycogen breakdown.

IV. Glucagon promotes glycogen breakdown.

V. Glucose-6-phosphate is an allosteric inhibitor of
.phosphorylase

A) I and V
B) III and V
C) II only
D) III and IV
E) V only

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