Which of the following statements correctly describes the process of GPCR signaling? The GPCR activation is reversible after the signal of the ligand diminishes.
O The membrane-embedded enzyme uses GTP as a secondary messenger to initiate gene expression.
O The ligand attaches to both the GPCR and the membrane-embedded enzyme to activate the GPCR pathway.
O The ligand-bound GPCR sends a GTP molecule to an enzyme in the membrane and switches it into an active
state.