c340 Quiz 12

Quiz 12
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1-3. What happens to liver cell glycogen metabolism when glucagon binds its receptor?
Question 2 enzymes are (P) glycogen phosphorylase and (S) glycogen synthase.

Is glycogen (D) degraded or (S) synthesized?	Is the regulated enzyme (P), (S), or (B) both?	Is regulation (A) allosteric, (C) covalent, or (B) both?
1.	2.	3.

4-6. The pyruvate dehydrogenase complex catalyzes a multi-step reaction, including oxidizing FADH₂. Focus just on this part of the reaction to answer the questions.

Which enzyme (E₁, E₂, or E₃)?	Name the product of this enzyme.	Which coenzyme is directly reduced? (C) CoA; (F) FAD; (L) lipoate; (N) NAD⁺; (T) TPP
4.	5.	6.

7-10. Each molecule below is a reactant in the citric acid cycle. For each, draw the product and write the name of the product. Use the back if you need more room.

1-3. What happens to liver cell glycogen metabolism when [glucose-6-phosphate] is high?
Question 1 enzymes are (P) glycogen phosphorylase and (S) glycogen synthase.

Is the regulated enzyme (P), (S), or (B) both?	Is regulation (A) allosteric, (C) covalent, or (B) both?	Is glycogen (D) degraded or (S) synthesized?
1.	2.	3.

4-6. The pyruvate dehydrogenase complex catalyzes a multi-step reaction, including converting H₂-lipoate → lipoate. Focus just on this part of the reaction to answer.

Which enzyme (E₁, E₂, or E₃)?	Name the product of this enzyme.	Which coenzyme oxidizes dihydrolipoate? (C) CoA; (F) FAD; (L) lipoate; (N) NAD⁺; (T) TPP
4.	5.	6.

7-10. Each molecule below is a reactant in the citric acid cycle. For each, draw the product and write the name of the product. Use the back if you need more room.

1-3. What happens to skeletal muscle cell glycogen metabolism when [ATP] is high?
Question 2 enzymes are (P) glycogen phosphorylase and (S) glycogen synthase.

Is glycogen (D) degraded or (S) synthesized?	Is the regulated enzyme (P), (S), or (B) both?	Is regulation (A) allosteric, (C) covalent, or (B) both?
1.	2.	3.

4-6. The pyruvate dehydrogenase complex catalyzes a multi-step reaction, including removing a carbon from pyruvate. Focus just on this part of the reaction.

Which enzyme (E₁, E₂, or E₃)?	Name the product of this enzyme.	Which coenzyme is directly required? (C) CoA; (F) FAD; (L) lipoate; (N) NAD⁺; (T) TPP
4.	5.	6.

7-10. Each molecule below is a reactant in the citric acid cycle. For each, draw the product and write the name of the product. Use the back if you need more room.

1-3. What happens to skeletal muscle cell glycogen metabolism when epinephrine binds its receptor?
Question 1 enzymes are (P) glycogen phosphorylase and (S) glycogen synthase.

Is the regulated enzyme (P), (S), or (B) both?	Is regulation (A) allosteric, (C) covalent, or (B) both?	Is glycogen (D) degraded or (S) synthesized?
1.	2.	3.

4-6. The pyruvate dehydrogenase complex catalyzes a multi-step reaction, including transferring C₂ from one coenzyme to another. Focus just on this part of the reaction.

Which enzyme (E₁, E₂, or E₃)?	Name the product of this enzyme.	Which coenzyme is required for the transfer? (C) CoA; (F) FAD; (L) lipoate; (N) NAD⁺; (T) TPP
4.	5.	6.

7-10. Each molecule below is a reactant in the citric acid cycle. For each, draw the product and write the name of the product. Use the back if you need more room.

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