MDCAT Biology MCQ #971

Which mechanism provides the strongest covalent stabilization for the tertiary structure of a globular protein like lysozyme?

MDCAT Biology MCQ #971

  1. Question 1

    Q1. Which mechanism provides the strongest covalent stabilization for the tertiary structure of a globular protein like lysozyme?

    • A) Formation of disulfide bridges between cysteines
    • B) Formation of hydrogen bonds between R-groups
    • C) Ionic interactions between acidic and basic side chains
    • D) Hydrophobic exclusions of non-polar amino acids

    Answer: Formation of disulfide bridges between cysteines

    Explanation: Disulfide bridges are strong covalent bonds between cysteine residues. Hydrogen bonds are weaker and primarily stabilize secondary structures.