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Question 9. (2 pts) Which statement about gluconeogenesis is TRUE?
A. All reactions of gluconeogenesis are the reverse of glycolysis reactions.
B. Gluconeogenesis occurs in mammals but not in other types of organisms.
C. The liver is the primary site of gluconeogenesis in humans.
D. Only carbohydrate compounds are precursors for gluconeogenesis.
Question 10. (5pts.) Rates of biochemical reactions can be affected by
(circle all the correct answers)
A. Concentration of reactants
B. Concentration of the enzyme
C. Intrinsic activity of the enzyme
D. Concentrations of effectors
F. Competing substrates
G pH, ionic environment
H phosphorylation of the enzyme
Question 11. (4 pts) Which one of the following statements is FALSE?
A. Protein kinases usually add a phosphoryl group from ATP to a Ser, Thror Tyr
B. An enzyme could be activated or inactivated by a protein kinase.
"C. ATP stimulates glycolysis and inhibits gluconeogenesis.
D. In feedback inhibition, the product of a pathway inhibits an early enzymatic step.
Question 12. Citric acid cycle
A. (2 pts) What is the cofactor used by the succinate dehydrogenase reaction in the
citric acid cycle?
B. (4 pts) Draw the four carbon compound that is a product of the succinate
dehydrogenase reaction in the citric acid cycle:
Question 13. (2 pts) Which one of the following is NOT a biological function of the citric
A. Completing the oxidation of carbon from glucose to CO2
B. Generation of NADH
C. Production of GTP, which can be interconverted with ATP
D Production of ribose 5-phosphate, a precursor for nucleotides and coenzymes
E. Generation of FADH2...
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- Spring '11
- Exam #3