Tag: heredity and variation

Questions Related to heredity and variation

Addiction of smoking leads to

zoology heredity and variation effects of smoking smoking tobacco drugs

  1. Lung cancer

  2. Bronchitis

  3. Emphysema

  4. All of the above

Show answer
Correct Option: D
Explanation:

Smoking is a practice in which a substance is burned and the resulting smoke breathed in to be tasted and absorbed into the bloodstream.
Emphysema is a form of chronic lung disease, usually caused by smoking.
Bronchitis is caused by tobacco smoke, dust, fumes, vapors and air pollution.
Changes in lung tissue begin when one inhale cigarette smoke.
Therefore, the correct answer is option D.

Substance in tobacco responsible for addiction is

zoology heredity and variation effects of smoking smoking tobacco drugs

  1. Nicotine

  2. Caffeine

  3. Thiene

  4. All of the above

Show answer
Correct Option: A

Out of 4000 chemicals released by cigarette, potent carcinogens are

zoology heredity and variation effects of smoking smoking tobacco drugs

  1. 12

  2. 43

  3. 216

  4. 172

Show answer
Correct Option: B
Explanation:

A substance that causes cancer is called a carcinogen. Cigarette smoke contains more than 4,000 chemicals out of which 43 are carcinogenic. Some of the carcinogens are nicotine, formaldehyde, benzene, carbon monoxide, etc. Most of the cigarette smoke remains in the lungs. This smoke damages the lung walls causing cancer. Thus the correct answer is option B.

Smokers metabolize nicotine to form

zoology heredity and variation effects of smoking smoking tobacco drugs

  1. Uric acid

  2. Urea

  3. Cotinine

  4. All of the above

Show answer
Correct Option: C
Explanation:

Nicotine is a major constituent of tobacco, which plays a critical role in smoking addiction. In humans, nicotine is primarily metabolized to cotinine, which is further metabolized to trans-3'-hydorxycotinine.
Thus, the correct answer is option (C), 'Cotinine'.