Which of the following is a conjugated protein?
- A. albumin
- B. haemoglobin
- C. keratin
- D. fibroin
Explanation
Haemoglobin carries a non protein haem prosthetic group that does the actual oxygen binding, which makes it conjugated. Albumin, keratin and fibroin consist of polypeptide alone and yield only amino acids on hydrolysis. Glycoproteins and lipoproteins are conjugated in the same sense, with carbohydrate or lipid attached.
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