Match List I with List II :

List I	List II
A. Trypsin	I. Intercellular ground substance
B. Morphine	II. Lectin
C. Concanavalin A	III. Enzyme
D. Collagen	IV. Alkaloid

Choose the correct answer from the options given below :

Solution & Explanation

Answer: (A) A-III, B-IV, C-II, D-I. Solution: Trypsin is listed in NCERT Table 9.5 as an enzyme (A–III). Morphine is an alkaloid, a secondary metabolite in Table 9.3 (B–IV). Concanavalin A is the example given for lectins in Table 9.3 (C–II). Collagen is listed in Table 9.5 as the intercellular ground substance, and the text confirms it is the most abundant protein in the animal world (D–I). This matching uniquely fits option A. NCERT Reference: Ch 9, p.110, line ~27 — "Collagen is the most abundant protein in animal world" (with Table 9.5, p.109: Collagen — Intercellular ground substance, Trypsin — Enzyme)