MDCAT Biology MCQ #837

Hemoglobin is a complex protein consisting of two alpha and two beta chains. This level of organization is distinct from a single-chain protein like myoglobin because of:

MDCAT Biology MCQ #837

  1. Question 1

    Q1. Hemoglobin is a complex protein consisting of two alpha and two beta chains. This level of organization is distinct from a single-chain protein like myoglobin because of:

    • A) Secondary structure
    • B) Tertiary structure
    • C) Quaternary structure
    • D) Primary structure

    Answer: Quaternary structure

    Explanation: Quaternary structure involves multiple polypeptide chains, whereas tertiary structure is the folding of a single chain; hemoglobin has four distinct chains.