Neurochemistry Signaling Mechanisms Quiz
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Questions and Answers

Which molecular mechanism for transmembrane signaling involves receptors with intrinsic or associated tyrosine kinase activity?

  • Ligand-gated ion channels
  • G-protein-coupled receptors
  • Receptors with intrinsic guanylyl cyclase activity
  • Receptors with intrinsic or associated tyrosine kinase activity (correct)

    • What do G proteins bind to?

  • Thymidine triphosphate (TTP) and thymidine diphosphate (TDP)
  • Cytosine triphosphate (CTP) and cytosine diphosphate (CDP)
  • Guanosine triphosphate (GTP) and guanosine diphosphate (GDP) (correct)
  • Adenosine triphosphate (ATP) and adenosine diphosphate (ADP)

    • What is the composition of heterotrimeric G proteins?

  • Two subunits: α and β
  • One subunit: α
  • Three subunits: α, β, and γ (correct)
  • Four subunits: α, β, γ, and δ

    • Which cellular process do G proteins NOT play a role in?

    <p>DNA replication</p> Signup and view all the answers

    What is the function of heterotrimeric G proteins?

    <p>Facilitating cell-cell communication</p> Signup and view all the answers

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