MDCAT Biology MCQ #726

During the folding of a globular protein, a covalent bond forms between the sulfur atoms of two cysteine residues. Name this bond.

MDCAT Biology MCQ #726

  1. Question 1

    Q1. During the folding of a globular protein, a covalent bond forms between the sulfur atoms of two cysteine residues. Name this bond.

    • A) Hydrogen bond
    • B) Ionic bond
    • C) Peptide bond
    • D) Disulfide bond

    Answer: Disulfide bond

    Explanation: Disulfide bonds are covalent links between sulfur atoms in cysteine; peptide bonds link the amino and carboxyl groups of the backbone.