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The G Protein-Mediated Cascade Stimulated by Epinephrine Within a Liver

Question 19

Multiple Choice

The G protein-mediated cascade stimulated by epinephrine within a liver cell results in the phosphorylation of two key enzymes.The eventual results of this phosphorylation are the _______ of glycogen synthase and the _______ of glycogen phosphorylase, leading to the release of glucose.


A) inhibition; activation
B) activation; inhibition
C) inhibition; degradation
D) activation; activation
E) inhibition; inhibition

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