Which of the following correctly explains the structure of myoglobin:
Correct answer: D. 1 Polypeptide chains + 1 Heme portions
- A. 4 Polypeptide chains + 4 Heme portions
- B. 4 Polypeptide chains + 1 Heme portions
- C. 1 Polypeptide chains + 4 Heme portions
- D. 1 Polypeptide chains + 1 Heme portions
Explanation
Myoglobin is a 17-kDa protein found in cardiac and red muscle tissues for oxygen storage. It contains a single polypeptide chain and one heme group.
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About Proteins
Proteins are polymers of amino acids joined by peptide bonds, and their function depends on primary, secondary, tertiary and quaternary structure. The topic covers fibrous and globular proteins, enzymes, antibodies, hormones and transport proteins, as well as denaturation by heat or extreme pH.
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