Match the following: (a) Inhibitor of catalytic activity (b) Possess peptide bonds (c) Cell wall material in fungi (d) Secondary metabolite (i) Ricin (ii) Malonate (iii) Chitin (iv) Collagen Choose the correct option from the following:
Answer: (C) (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i). Answer: (C) (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i).
- A.(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- B.(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
- C.(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)✓
- D.(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
Correct Answer
(C) (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
Solution & Explanation
Answer: (C) (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i). Solution: (a) Inhibitor of catalytic activity = malonate (ii), the classic competitive inhibitor of succinic dehydrogenase. (b) Possess peptide bonds = collagen (iv), a protein and hence a chain of amino acids joined by peptide bonds. (c) Cell wall/structural material in fungi (and arthropod exoskeleton) = chitin (iii), a complex polysaccharide. (d) Secondary metabolite = ricin (i), a toxin listed among secondary metabolites in Table 9.3. This gives a-ii, b-iv, c-iii, d-i = option C. NCERT Reference: Ch 9, p.117, line ~10 — "inhibition of succinic dehydrogenase by malonate which closely resembles the substrate succinate in structure."