MDCAT Biology MCQ #701

An athlete's muscle cells contain myoglobin to store oxygen. Which level of protein organization is absent in myoglobin but present in hemoglobin?

MDCAT Biology MCQ #701

  1. Question 1

    Q1. An athlete's muscle cells contain myoglobin to store oxygen. Which level of protein organization is absent in myoglobin but present in hemoglobin?

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

    Answer: Quaternary structure

    Explanation: Myoglobin is a tertiary protein with a single chain, lacking quaternary structure. Hemoglobin is tempting because both carry oxygen, but it is quaternary.