The recognition of a chemical signal by a receptor protein in the membrane is most similar to ____.
A) mRNA specifying the sequence of amino acids in a polypeptide
B) binding of a specific substrate to the active site of an enzyme
C) turning on gene transcription
D) allosteric regulation of proteins
E) an enzyme requiring a specific optimum pH and temperature for activity

Question

Quizplus · Accepted Answer

The recognition of a chemical signal by a receptor protein in the membrane is most similar to the binding of a specific substrate to the active site of an enzyme because both processes involve a specific molecule (ligand or substrate) binding to a specific site on a protein (receptor or enzyme) based on shape and chemical compatibility.

The Recognition of a Chemical Signal by a Receptor Protein