Insulin and glucagons are __________ in nature.
Correct answer: A. Protein
- A. Protein
- B. Amino acid derivative
- C. Polypeptide
- D. Steroid
Explanation
Insulin and glucagon are peptide hormones made of amino-acid chains, so they are classified broadly as proteins. Insulin contains 51 amino acids and glucagon contains 29 amino acids. The likely alternative is polypeptide, but that term describes their chain structure and is a narrower description than the expected broad class protein.
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