Identify the substances having glycosidic bond and peptide bond, respectively in their structure:

Solution & Explanation

Answer: (B) Inulin, insulin. Solution: A glycosidic bond joins monosaccharide units in a polysaccharide, while a peptide bond joins amino acids in a protein. Inulin is a polymer of fructose (a polysaccharide), so its sugar units are linked by glycosidic bonds; insulin is a protein (a polypeptide) and so contains peptide bonds. Therefore inulin (glycosidic) and insulin (peptide) is the correct pair. NCERT Reference: Ch 9, p.110, line ~38 — "Inulin is a polymer of fructose." (Peptide bonds in proteins: p.109, line ~40 — "Proteins are polypeptides. They are linear chains of amino acids linked by peptide bonds".)