Protein present in haemoglobin has the structure known as:
Correct answer: D. Quaternary structure
- A. Primary structure
- B. Secondary structure
- C. Tertiary structure
- D. Quaternary structure
Explanation
The protein present in hemoglobin has a tertiary structure. Hemoglobin is a globular protein composed of four polypeptide chains (two alpha and two beta chains) that are folded into a complex three-dimensional structure. This three-dimensional arrangement of the polypeptide chains is known as the tertiary structure. Therefore, option c is correct.
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About Classification of Proteins
Proteins are classified by composition as simple, conjugated and derived proteins, and by shape as fibrous or globular proteins. The topic relates these classes to examples such as albumin, keratin, collagen, haemoglobin and casein, while distinguishing structural proteins from proteins with transport, catalytic or regulatory roles.
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