1. α - glycosidic bond 2. β - glycosidic bond 3. peptide bond 4. dative bond

Topic: Amino acids, peptide bond, protein structure, denaturation· Biomolecules

In a protein molecule various amino acids are linked together by :

1. \(\alpha\) - glycosidic bond

2. \(\beta\) - glycosidic bond

3. peptide bond

4. dative bond

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Answer: 3. peptide bond

Key idea: amino acids join through the amide linkage between the -COOH of one and the -NH₂ of the next, formed by loss of water. This is a peptide bond. Glycosidic bonds join sugars, so options 1 and 2 are wrong, and a dative bond is not the linkage in proteins.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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In a protein molecule various amino acids are linked together by :

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