The transmission of g-protein-coupled receptors involves only two steps: binding to the receptor protein and activation of g-proteins. true or false?

False

Explanation:

G-Protein Coupled Receptors (GPCR):

GPCRs are transmembrane receptors with three components:

Extracellular domain for ligand bindingSeven transmembrane helicesIntracellular G-protein binding domain

Transmission Through GPCRs:

A ligand binds to the extracellular domain of the GPCR.The GPCR undergoes conformational changes.This conformational change activates the G-protein by replacing its bound GDP (guanosine diphosphate) with GTP (guanosine triphosphate).The G-protein then loses its GTP bound alpha subunit which activates the adenylyl cyclase system.

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