Match list I with list II. List I: (a) Protein; (b) Unsaturated fatty acid; (c) Nucleic acid; (d) Polysaccharide List II: (i) C=C double bonds; (ii) Phosphodiester bonds; (iii) Glycosidic bonds; (iv) Peptide bonds
Answer: (C) (a)-(iv); (b)-(i); (c)-(ii); (d)-(iii). Answer: (C) (a)-(iv); (b)-(i); (c)-(ii); (d)-(iii).
- A.(a)-(ii); (b)-(i); (c)-(iv); (d)-(iii)
- B.(a)-(iv); (b)-(iii); (c)-(i); (d)-(ii)
- C.(a)-(iv); (b)-(i); (c)-(ii); (d)-(iii)✓
- D.(a)-(i); (b)-(iv); (c)-(iii); (d)-(ii)
Correct Answer
(C) (a)-(iv); (b)-(i); (c)-(ii); (d)-(iii)
Solution & Explanation
Answer: (C) (a)-(iv); (b)-(i); (c)-(ii); (d)-(iii). Solution: (a) Protein = peptide bonds (iv), since proteins are polypeptides of amino acids linked by peptide bonds. (b) Unsaturated fatty acid = C=C double bonds (i), as unsaturated fatty acids carry one or more C=C bonds. (c) Nucleic acid = phosphodiester bonds (ii), the phosphate linkages joining nucleotides. (d) Polysaccharide = glycosidic bonds (iii), joining monosaccharide building blocks. This gives a-iv, b-i, c-ii, d-iii = option C. NCERT Reference: Ch 9, p.106, line ~19 — "Fatty acids could be saturated (without double bond) or unsaturated (with one or more C=C double bonds)." (Protein peptide bonds: p.109, line ~40; polysaccharide sugar building blocks: p.110, line ~32.)