CBSE  /  Class 9  /  Science  /  Why do we Fall Ill

  • 1. 
    Which one of the following is not a viral disease?

  • Dengue
  • AIDS
  • Typhoid
  • Influenza

  • 2. 
    Which one of the following is not a bacterial disease?

  • Cholera
  • Tuberculosis
  • Anthrax
  • Influenza

  • 3. 
    Which one of the following disease is not transmitted by mosquito?

  • Brain fever
  • Malaria
  • Typhoid
  • Dengue

  • 4. 
    Which one of the following disease is not caused by bacteria?

  • Typhoid
  • Anthrax
  • Tuberculosis
  • Malaria

  • 5. 
    Which one of the following diseases is caused by protozoans?

  • Malaria
  • Influenza
  • AIDS
  • Cholera

  • 6. 
    Which one of the following has a long term effect on the health of an individual?

  • Common cold
  • Chicken pox
  • Chewing tobacco
  • Stress

  • 7. 
    Which of the following can make you ill if you come in contact with an infected person?

  • High blood pressure
  • Genetic abnormalities
  • Sneezing
  • Blood cancer

  • 8. 
    AIDS cannot be transmitted by

  • sexual contact
  • hugs
  • breast feeding
  • blood transfusion

  • 9. 
    Making anti-viral drugs is more difficult than making anti-bacterial medicines because

  • viruses make use of host machinery
  • viruses are on the border line of living and non-living
  • viruses have very few biochemical mechanisms of their own
  • viruses have a protein coat

  • 10. 
    Which one of the following causes kala-azar?

  • Ascaris
  • Trypanosoma
  • Leishmania
  • Bacteria
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