Class 12 biology chapter 10 MCQs (Human Health and Diseases MCQ)
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1. Which of the following is NOT caused by unsterilized needles?
  a. Elephantiasis
  b. AIDS
  c. Malaria
  d. Hepatitis B
Answer : Elephantiasis
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2. Opium derivative is …………..
  a. Codeine
  b. Caffeine
  c. Heroin
  d. Psilocybin
Answer : CodeineÂ
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3. The stimulant present in tea is ………….
  a. tannin
  b. cocaine
  c. caffeine
  d. crack
Answer : Caffeine
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4. Which of the following is caused by smoking?
  a. Liver cirrhosis
  b. Pulmonary tuberculosis
  c. Emphysema
  d. Malaria
Answer : Pulmonary tuberculosis
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5. An antibody is ……………
  a. molecule that binds specifically an         antigen
  b. WBC which invades bacteria
  c. secretion of mammalian RBC
  d. cellular component of blood
Answer : Molecule that binds specifically an antigen
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6. The antiviral proteins released by a virus-infected cell are called …………
  a. histamines
  b. interferons
  c. pyrogens
  d. allergens
Answer : Interferons
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7. Both B-cells and T-cells are derived from ………………..
  a. lymph nodes
  b. thymus glands
  c. liver
  d. stem cells in bone marrow
Answer : Stem cells in bone marrow
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8. Which of the following diseases can be contracted by droplet infection?
  a. Malaria
  b. Chicken pox
  c. Pneumonia
  d. Rabies
Answer : MalariaÂ
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9. Confirmatory test used for detecting HIV infection is ……………..
  a. ELISA
  b. Western blot
  c. Widal test
  d. Eastern blot
Answer : ELISAÂ
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10. Elephantiasis is caused by …………
  a. W. bancrofti
  b. P. vivax
  c. Bedbug
  d. Elephant
Answer : W. bancroftiÂ
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11. Innate immunity is provided by ………..
  a. phagocytes
  b. antibody
  c. T- Lymphocytes
  d. B- Lymphocytes
Answer : Phagocytes.
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