Which is the best definition of the term ligand?
A) a receptor composed of protein
B) a molecule or ion that binds to a protein
C) any molecule found in the intracellular fluid
D) any molecule found in the extracellular fluid
E) a carbohydrate molecule that binds weakly to membrane phospholipids

Question

Quizplus · Accepted Answer

A ligand is a molecule or ion that binds to a receptor, which is often a protein. Therefore, option B - “a molecule or ion that binds to a protein” is the best definition of a ligand. Options A, C, D, and E are not accurate definitions of ligands.

Which Is the Best Definition of the Term Ligand