Metabolic Regulation and Disorders II - Biochemistry Quiz
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Questions and Answers

Which regulatory mechanism involves the binding of a molecule at a site other than the active site, leading to a change in enzyme activity?

  • Allosteric regulation (correct)
  • Feedback inhibition
  • Covalent modification
  • Competitive regulation
  • Which regulatory mechanism involves the binding of a molecule that resembles the substrate, competing with the substrate for the active site of the enzyme?

  • Covalent modification
  • Allosteric regulation
  • Competitive regulation (correct)
  • Feedback inhibition
  • Which hormone is primarily responsible for stimulating glycogenolysis in the liver?

  • Insulin
  • Aldosterone
  • Epinephrine
  • Glucagon (correct)
  • Which of the following is NOT a key enzyme involved in the regulation of glycogen metabolism?

    <p>Glucose-6-phosphatase</p> Signup and view all the answers

    Which ion plays a role in the regulation of glycogen metabolism through its influence on glycogen phosphorylase activity?

    <p>Calcium</p> Signup and view all the answers

    In the fasting state, which of the following leads to an increase in glycogenolysis?

    <p>Decreased glucose availability and increased ATP</p> Signup and view all the answers

    Which form of glycogen synthase is active and converts to inactive form in the presence of cAMP?

    <p>Glycogen synthase 'a' (GS-a)</p> Signup and view all the answers

    What leads to the conversion of inactive glycogen phosphorylase 'b' (GP-b) to active glycogen phosphorylase 'a' (GP-a)?

    <p>Increased cAMP and protein kinase</p> Signup and view all the answers

    In the fed state, what is the effect of insulin on cAMP levels?

    <p>Decreases cAMP levels</p> Signup and view all the answers

    Which hormonal factor contributes to the activation of adenylate cyclase activity?

    <p>Epinephrine</p> Signup and view all the answers

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