Ribonuclease is composed of a single polypeptide chain, and its spatial structure is maintained by four intramolecular disulfide bonds. When urea and β-mercaptoethanol are added to the enzyme solution, enzyme activity is lost; when urea and β-mercaptoethanol are removed through dialysis, the enzyme regains its original biological activity. This phenomenon indicates
Correct answer: A. denatured proteins can sometimes renature
The phenomenon described indicates that denatured ribonuclease can sometimes renature, meaning it can regain its original biological activity after removal of denaturing agents.