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

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.

2

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

the answer would be knowledge about cars!

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.