A receptor on the cell surface usually has several domains.The function of the external domain is:
A) transmitting the signal to the inside of the cell.
B) holding the receptor within the membrane.
C) attaching the receptor to the DNA.
D) functioning as an enzyme.
E) binding the signaling molecule.

Question

Quizplus · Accepted Answer

The external domain of a cell surface receptor is responsible for binding the signaling molecule, which is often a ligand such as a hormone or neurotransmitter.

A Receptor on the Cell Surface Usually Has Several Domains