Which is the habit-forming ingredient of tobacco?(a) Nicotine(b) Tar(c) Catechol(d) PhenolI have been asked this question in an interview.My doubt stems from Human Health and Disease in division Human Health and Disease of Biology – Class 12

Which is the habit-forming ingredient of tobacco?(a) Nicotine(b) Tar(c

1.	Which is the habit-forming ingredient of tobacco?(a) Nicotine(b) Tar(c) Catechol(d) PhenolI have been asked this question in an interview.My doubt stems from Human Health and Disease in division Human Health and Disease of Biology – Class 12
Answer» The correct option is (a) Nicotine For EXPLANATION I would SAY: Habit-forming active ingredient of tobacco is nicotine. It is synthesised in the roots but accumulates in the leaves. Nicotine CONTENT of tobacco LEAF is 0.5-8%. A CIGARETTE contains 6-11 mg of nicotine, out of which 1-3 mg is inhaled.

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