Which of the following is correct regarding the regulation of glycolysis at the formation of fructose 1,6 bisphosphate?
a. FBPase2 is activated when the PFK2 is dephosphorylated.
b. Fructose 6-phosphate inactivates phosphoprotein phosphatase.
c. Dephosphorylation of PFK2 causes the activation of PFK1.
d. Excess fructose 6-phosphate causes fructose 2,6 bisphosphate to decrease.
e. cAMP causes PFK2 to become activated.
f. Glucagon ultimately activates PFK1.