G Protein Quiz
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Questions and Answers

Which type of G protein activates adenylyl cyclase when certain ligands bind to specific GPCRs on the cell membrane?

  • Gq
  • Gi
  • G12
  • Gs (correct)
  • When an agonist binds to a Gs-coupled receptor, what happens to the G protein?

  • The G protein exchanges its bound GDP for a GTP molecule (correct)
  • The G protein activates adenylyl cyclase
  • The G protein dissociates from the beta-gamma subunits
  • The G protein exchanges its bound GTP for a GDP molecule
  • Which subunit of the Gs protein dissociates from the beta-gamma subunits when activated?

  • Gamma subunit (γ)
  • Delta subunit (δ)
  • Beta subunit (β)
  • Alpha subunit (αs) (correct)
  • What is the main effect of the activated Gs protein on adenylyl cyclase?

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

    Which type of G protein inhibits adenylyl cyclase when certain ligands bind to specific GPCRs on the cell membrane?

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

    When an agonist binds to a Gi-coupled receptor, what happens to the G protein?

    <p>The G protein exchanges its bound GDP for a GTP molecule</p> Signup and view all the answers

    Which subunits of the Gi protein work together to inhibit adenylyl cyclase?

    <p>Alpha subunit (αi) and beta-gamma subunits</p> Signup and view all the answers

    What is the main effect of the activated Gi protein on adenylyl cyclase?

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

    Which type of G protein activates phospholipase C when certain ligands bind to specific GPCRs on the cell membrane?

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

    Which type of G protein is not mentioned in the provided text?

    <p>G12</p> Signup and view all the answers

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