Glycogenesis + Regulation
16 Questions
3 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which enzyme is responsible for the conversion of UDP-glucose to glucose 1-phosphate?

  • Branching enzyme
  • Glycogen synthase kinase 3 (GSK3)
  • UDP-glucose pyrophosphorylase (correct)
  • Protein phosphorylase 1 (PP1)
  • Which protein kinase is activated by insulin and plays a role in glycogenesis?

  • Protein kinase B (correct)
  • Phosphatidyl-inositol-3-kinase
  • Protein kinase A (PKA)
  • Glycogen synthase kinase 3 (GSK3)
  • Which process is responsible for the introduction of alpha-1,6 linkages in glycogen synthesis?

  • Branching enzyme activity (correct)
  • Glycogen synthase activity
  • UDP-glucose pyrophosphorylase activity
  • Protein phosphorylase 1 (PP1) activity
  • What is the primary role of protein phosphorylase 1 (PP1) in glycogen metabolism?

    <p>Dephosphorylating and activating glycogen synthase</p> Signup and view all the answers

    Which compound is produced during the conversion of glucose 6-phosphate to glucose 1-phosphate?

    <p>PPi (pyrophosphate)</p> Signup and view all the answers

    Which enzyme is responsible for extending both the main chain and branches in glycogen synthesis?

    <p>Glycogen synthase</p> Signup and view all the answers

    What enzyme is responsible for inactivating glycogen synthase through phosphorylation?

    <p>Protein kinase A (PKA)</p> Signup and view all the answers

    Which enzyme dephosphorylates and activates glycogen synthase in glycogenesis?

    <p>Protein phosphatase 1 (PP1)</p> Signup and view all the answers

    What molecule activates phosphatidylinositol-3-kinase in the glycogenesis pathway?

    <p>UDP-glucose</p> Signup and view all the answers

    Which enzyme is responsible for introducing alpha-1,6 linkages in the branching of glycogen synthesis?

    <p>Branching enzyme</p> Signup and view all the answers

    What kinase is inhibited to prevent the phosphorylation and inactivation of glycogen synthase in glycogenesis?

    <p>Glycogen synthase kinase 3 (GSK3)</p> Signup and view all the answers

    Glycogen synthase is active when phosphorylated.

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

    Insulin signaling leads to the activation of glycogen synthase.

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

    Glucagon activates protein kinase B in the glycogenesis pathway.

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

    PP1 inactivates glycogen synthase by phosphorylating it.

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

    UDP-glucose activates phosphatidylinositol-3-kinase in glycogenesis.

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

    More Like This

    Implications of Glycogenesis
    5 questions

    Implications of Glycogenesis

    BelievableJadeite9399 avatar
    BelievableJadeite9399
    Glycogenesis and storage diseases
    29 questions
    Use Quizgecko on...
    Browser
    Browser