Question

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.

Answer 1

b

Step-by-step explanation:

PCRs are a large family of cell surface receptors that respond to a variety of external signals. Binding of a signaling molecule to a GPCR results in G protein activation, which in turn triggers the production of any number of second messengers.

Answer 2

B) The membrane-embedded enzyme uses GTP as a secondary messenger to initiate gene expression.

Step-by-step explanation:

Due to the fact G Protein Coupled Receptors (GPCRs) perceive many extracellular signals and transduce them to heterotrimeric G proteins, which further transduce these signals intracellular to appropriate downstream effectors and thereby play an important role in various signaling pathways

If im wrong so be it >:)