A specific ligand is polar in nature. Where is the ligand-binding portion of the receptor most likely to be located?

on the extracellular side of the cell membrane

Explanation:

Ligands can be defined as signaling molecules that interact with receptors localized on target cells. Protein ligands are generally polar and soluble in water. In consequence, they tend to bind with extracellular domain receptors localized on the cell surface, on the outside surface of the cell. Some examples of protein ligands include, among others, hormones (e.g., insulin), growth factors, neurotransmitters, etc.

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).

answer; i believe that the correct answer is (lung);