Identify the substances having glycosidic bond and peptide bond, respectively in their structure
- Glycerol, trypsin
- Cellulose, lecithin
- Inulin, insulin
- Chitin, cholesterol
Answer
(3) Inulin, insulin
Solution
As per NCERT, the monosaccharides in a polysaccharide are joined by glycosidic bonds, and the amino acids in a protein are joined by peptide bonds.
Inulin is a polymer of fructose (glycosidic bonds) and insulin is a protein (peptide bonds), so this pair fits.
Glycerol is a trihydroxy alcohol with no glycosidic bond, lecithin is a phospholipid and cholesterol is a steroid; none of these has a peptide bond, so the other pairs do not fit.
∴ The correct pair is inulin and insulin.
Answer: (3)