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  4. Which of the following secondary metabolites are wrongly matched with their categories? A. Toxin - Ricin B. Drug - Curcumin C. Alkaloid - Codeine D. Lectin - Abrin

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Q. Which of the following secondary metabolites are wrongly matched with their categories?
A. Toxin - Ricin
B. Drug - Curcumin
C. Alkaloid - Codeine
D. Lectin - Abrin

NTA AbhyasNTA Abhyas 2020Biomolecules

Solution:

List of secondary metabolites:
Toxins - abrin, ricin
Alkaloids - morphine, codeine
Drugs - vinblastine, curcumin
Lectin - concanavalin A
Abrin is a toxin, not a lectin. Lectins are a class of proteins mostly of plant origin which bind to specific sugars and cause agglutination. One such example is concanavalin A.