Question

HURRY PLEASE

Which of the Following statements correctly describes the process of GPCR signaling?

1. The GPCR activation is reversible after the signal of the ligand diminishes.
2. The membrane-embedded enzyme uses GTP as a secondary messenger to initiate gene expression.
3. The Ligand attaches to both the GPCR and the membrane-embedded enzyme to activate the GPCR pathway.
4. The ligand-bound GPCR septs a GTP molecule to an enzyme in the membrane and switches it into an active state

Answer 1

2

2. The membrane-embedded enzyme uses GTP as a secondary messenger to

Answer 2

2

Explanation: GPCRs 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.