MDCAT Biology MCQ #869

A model of a protein shows a spiral secondary structure known as an alpha helix. How many amino acids are typically found in each turn of this helix?

MDCAT Biology MCQ #869

  1. Question 1

    Q1. A model of a protein shows a spiral secondary structure known as an alpha helix. How many amino acids are typically found in each turn of this helix?

    • A) 2.4 amino acids
    • B) 3.0 amino acids
    • C) 4.2 amino acids
    • D) 3.6 amino acids

    Answer: 3.6 amino acids

    Explanation: Alpha helix is a common secondary structure with 3.6 amino acids per turn, stabilized by hydrogen bonds, not covalent disulfide bridges.