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MDCAT Biology QUESTION #11241
Question 1
Which type of bond is primarily responsible for maintaining the tertiary structure of a protein?
  • Peptide bonds
  • Hydrogen bonds
  • Disulfide bridges✔️
  • Ionic bonds
Correct Answer Explanation
While hydrogen bonds, ionic bonds, and hydrophobic interactions all contribute to tertiary structure, disulfide bridges (covalent bonds between cysteine residues) provide strong covalent cross-links that significantly stabilize the tertiary structure.