Hemoglobin molecule exhibits which structural organization of proteins___________?
Correct answer: D. Quaternary structure
- A. Primary structure
- B. Secondary structure
- C. Tertiary structure
- D. Quaternary structure
Explanation
A haemoglobin molecule is made of four polypeptide subunits, usually two alpha and two beta chains, each containing a haem group. The association of these separate chains gives haemoglobin a quaternary structure. Students may choose c because each individual subunit has tertiary structure, but the complete haemoglobin molecule is described by its quaternary organization.
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