MDCAT Chemistry MCQ #4857

The alpha-helix structure of a protein is maintained by intramolecular forces. Between which specific groups do these bonds form?

MDCAT Chemistry MCQ #4857

  1. Question 1

    Q1. The alpha-helix structure of a protein is maintained by intramolecular forces. Between which specific groups do these bonds form?

    • A) Side chains of distant residues
    • B) N-H and C=O groups of the backbone
    • C) Disulfide bridges of cysteine
    • D) Hydrophobic interactions of non-polar groups

    Answer: N-H and C=O groups of the backbone

    Explanation: Alpha-helices are stabilized by backbone H-bonds; side chain interactions are tempting but stabilize the tertiary structure instead.