NEET 2021 · BiologyCell compositionPrevious Year Question
Identify the incorrect pair.
Answer: (B) Drugs - Ricin. Answer: (B) Drugs - Ricin.
- A.Lectins - Concanavalin A
- B.Drugs - Ricin✓
- C.Alkaloids - Codeine
- D.Toxin - Abrin
Correct Answer
(B) Drugs - Ricin
Solution & Explanation
Answer: (B) Drugs - Ricin. Solution: In NCERT Table 9.3 of secondary metabolites, Concanavalin A is listed as a lectin, codeine as an alkaloid, and ricin (along with abrin) as a toxin; the drugs listed are vinblastin and curcumin. Ricin is therefore a toxin, not a drug, making 'Drugs - Ricin' the incorrect pair; the other three pairings are correct. NCERT Reference: Ch 9, p.108, line ~52 — "Toxins Abrin, Ricin Lectins Concanavalin A Drugs Vinblastin, curcumin, etc."
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