Multiple choice Denatured protein has a/an Folded polypeptide chain Unfolded polypeptide chain Polypeptide chain liked with disulphide bonds Polypeptide chain linked with weak covalent bonds Reveal answer Fill a bubble to check yourself B Correct answer Explanation Denaturation is the process where a protein loses its native three-dimensional folded structure. This results in an unfolded polypeptide chain, rendering the protein biologically inactive.