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Which component of tobacco is the addictive, poisonous alkaloid that acts as a stimulant?
ATannic acid
BCurcumin
CNicotine
DLeptin
Answer & Solution
Correct answer: C. Nicotine
1. Tobacco comes from Nicotiana plants, and addiction to it is due to an alkaloid.
2. That alkaloid is nicotine, a highly harmful stimulant that also triggers adrenaline secretion.
3. Tannic acid, curcumin and leptin are not the addictive tobacco alkaloid, so they are distractors.
4. Hence the answer is C.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit "Health and Diseases", p.311_
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