Discussion
Which one of the options given correctly matches the alkaloids in Group I with their source plants in Group II?
| Group I | Group II |
|---|---|
| P. Cocaine | 1. Cocoa |
| Q. Caffeine | 2. Nightshade |
| R. Morphine | 3. Coca |
| S. Atropine | 4. Poppy |
Answer: A
The match is P-3; Q-1; R-4; S-2.
- Cocaine comes from the leaves of coca (Erythroxylum coca).
- Caffeine is present in cocoa (Theobroma cacao), alongside its relative theobromine.
- Morphine is the main alkaloid of the opium poppy (Papaver somniferum).
- Atropine comes from deadly nightshade (Atropa belladonna).
The trap is the similar names: options that give cocaine to cocoa and caffeine to coca swap the two, and the others misassign morphine or atropine as well.
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