in the liver, which one of the following is part of the pathway whereby increased glucagon causes a decrease in the glycolytic pathway?
a. activation of the fructose-2,6-bisphosphate and inhibition of phosphofructokinase-2
b. inhibition of the cAMP cascade
c. decreased phosphorylation of enzymes by protein kinase A
d. increased binding of GDP to G-protein
e. increased binding of fructose-2,6-bisphosphate to phosphofructokinase-1