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Questions and Answers

Which of the following is an allosteric activator of glycogen synthase b in both liver and muscle?

  • ATP
  • AMP
  • Glucose
  • Glucose 6-phosphate (correct)

What is the effect of low glucose and energy levels on glycogenolysis?

  • It remains the same
  • It is inhibited
  • It increases (correct)
  • It decreases

What is the effect of AMP on muscle glycogen phosphorylase?

  • It activates it (correct)
  • It phosphorylates it
  • It inhibits it
  • It has no effect

What is the effect of glucose 6-phosphate on glycogen phosphorylase a?

<p>It inhibits it (C)</p> Signup and view all the answers

What is the role of allosteric regulation in glycogenesis and glycogenolysis?

<p>It allows rapid response to the needs of a cell (A)</p> Signup and view all the answers

Which enzyme is responsible for glycogenolysis?

<p>Glycogen phosphorylase (C)</p> Signup and view all the answers

What is the effect of high substrate availability and energy levels on glycogenesis?

<p>It increases (A)</p> Signup and view all the answers

Which enzyme is allosterically activated by glucose 6-phosphate?

<p>Glycogen synthase b (A)</p> Signup and view all the answers

What is the effect of ATP on glycogen phosphorylase a?

<p>It inhibits it (B)</p> Signup and view all the answers

What is the function of allosteric regulation in relation to hormone-mediated covalent regulation?

<p>It can override the effects of hormone-mediated covalent regulation (A)</p> Signup and view all the answers

Which of the following is an allosteric activator of glycogen synthase b in both liver and muscle?

<p>Glucose 6-phosphate (B)</p> Signup and view all the answers

What is the effect of low glucose and energy levels on glycogenolysis?

<p>It increases (A)</p> Signup and view all the answers

What is the effect of AMP on muscle glycogen phosphorylase?

<p>It activates it (D)</p> Signup and view all the answers

What is the effect of glucose 6-phosphate on glycogen phosphorylase a?

<p>It inhibits it (C)</p> Signup and view all the answers

What is the role of allosteric regulation in glycogenesis and glycogenolysis?

<p>It allows rapid response to the needs of a cell (A)</p> Signup and view all the answers

Which enzyme is responsible for glycogenolysis?

<p>Glycogen phosphorylase (B)</p> Signup and view all the answers

What is the effect of high substrate availability and energy levels on glycogenesis?

<p>It increases (A)</p> Signup and view all the answers

Which enzyme is allosterically activated by glucose 6-phosphate?

<p>Glycogen synthase b (A)</p> Signup and view all the answers

What is the effect of ATP on glycogen phosphorylase a?

<p>It inhibits it (C)</p> Signup and view all the answers

What is the function of allosteric regulation in relation to hormone-mediated covalent regulation?

<p>It can override the effects of hormone-mediated covalent regulation (D)</p> Signup and view all the answers

Which of the following is true about glycogenesis?

<p>It is stimulated when substrate availability and energy levels are high (D)</p> Signup and view all the answers

What is the effect of glucose 6-phosphate on glycogen synthase b in both liver and muscle?

<p>It is allosterically activated (B)</p> Signup and view all the answers

What is the effect of glucose 6-phosphate on glycogen phosphorylase a?

<p>It is allosterically inhibited (D)</p> Signup and view all the answers

What is the effect of ATP on glycogen phosphorylase a?

<p>It is allosterically inhibited (B)</p> Signup and view all the answers

What is the effect of AMP on muscle glycogen phosphorylase?

<p>It is allosterically activated (C)</p> Signup and view all the answers

What is the effect of glucose and energy levels on glycogenolysis?

<p>It is stimulated when glucose and energy levels are low (B)</p> Signup and view all the answers

Which enzyme responds to the levels of metabolites and energy needs of the cell?

<p>Both glycogen synthase and glycogen phosphorylase (B)</p> Signup and view all the answers

What is the purpose of allosteric regulation in glycogen metabolism?

<p>To override the effects of hormone-mediated covalent regulation (D)</p> Signup and view all the answers

Which molecule allosterically activates glycogen synthase b in both liver and muscle?

<p>Glucose 6-phosphate (C)</p> Signup and view all the answers

Which molecule allosterically inhibits glycogen phosphorylase a?

<p>Glucose 6-phosphate (C)</p> Signup and view all the answers

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