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

What is the function of heterotrimeric G proteins?

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

Flashcards

Tyrosine Kinase Receptors

Receptors that have tyrosine kinase activity as part of their structure or closely linked.

What do G proteins bind?

Proteins that bind to GTP and GDP.

Heterotrimeric G Proteins

Three subunits: alpha (α), beta (β), and gamma (γ).

G proteins' role in DNA replication

Heterotrimeric G proteins do not play a role in this process.

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Function of G proteins

To facilitate cell-cell communication.