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
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