Question

6. During fasting the liver pyruvate kinase enzyme is :

A. inhibited by phosphorylation by PKA

B. activated by phosphorylation by PKA

C. located in the mitochondria

D. activated by ATP

_______7. Phosphorylation of glycogen phosphorylase kinase by PKA in the liver:

A. activates of glycogen synthase

B. inactivates of glycogen synthase

C. inactivates of glycogen phosphorylase kinase

D. activates of glycogen phosphorylase kinase

_____8. In the skeletal muscle when a football player runs sprints during practice, the NADH produced in glycolysis at the glyceraldehydes 3-phosphate step is re-oxidized primarily by:

A. Malate dehydrogenase

B. Lactate dehydrogenase

C. Pyruvate dehydrogenase

D. Isocitrate dehydrogenase

_____9. Which of the following compounds is an allosteric activator of pyruvate carboxylase?

A. Biotin

B. Acetyl CoA

C. NADH

D. insulin

______10. Fatty acids with an odd number of carbon atoms and certain branched-chain fatty acids can support the net synthesis of glucose because they:

A. are converted to acetoacetate and β-hydroxybutyrate

B. are converted to malonyl-CoA

C. can produce propionyl-CoA which is converted to succinyl-CoA

D. Increase the NAD/NADH ratio