Respuesta :
The correct option is B ; , A signal present on the outside of the cell leads to a change on the inside of the cell. G-protein coupled receptors transmit signals via heterotrimeric G-proteins.
These G-proteins are made up of three subunits (alpha, beta, gamma) of which only the alpha subunit binds guanine nucleotides. regulate the "state" of the G-protein by raising the rate of GTP hydrolysis. Inactivation of the drive.
Receptors are usually transmembrane proteins that bind to signaling molecules outside the cell and then convey the signal to internal signaling pathways via a series of molecular switches.
G protein-coupled receptors (GPCRs) are involved in the perception of vision, smell, taste, and pain. They are also important in cell identification and communication activities, making them a popular pharmacological target superfamily.
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Full Question ;
Which of the following statements best summarizes the function of G protein-coupled receptors?
Choice A., A G protein present on the outside of the cell leads to a change on the inside of the cell.
Choice B., A signal present on the outside of the cell leads to a change on the inside of the cell.
Choice C., A signal molecule on the outside of the cell is transported to the inside of the cell.
Choice D., A GTP molecule is bound to the receptor, which causes a conformational change inside the cell.
