CBSE  /  Class 8  /  Science  /  Microorganisms: Friend and Foe

  • 1. 
    Alcohol is produced with the help of

  • sodium chloride
  • yeast
  • nitrogen
  • carbon dioxide

  • 2. 
    Which of the following drug is an antipyretic?

  • Insulin
  • Alcohol
  • Streptomycin
  • Paracetamol

  • 3. 
    What helps in the rise of bread or dosa dough?

  • Heat
  • Grinding
  • Growth of yeast cells
  • Low pressure

  • 4. 
    The status of algae in the aquatic food chain is

  • consumers
  • producers
  • host
  • small in size

  • 5. 
    The rod shaped bacteria are called

  • Bacillus
  • Coccus
  • Vibrio
  • Spirillum

  • 6. 
    Bacteria present in root nodules of pea

  • Coli
  • Plasmodium
  • Rhizobium
  • Penicillin

  • 7. 
    The microorganism which contains chlorophyll

  • Virus
  • Fungus
  • Algae
  • All

  • 8. 
    The disease caused by protozoa is

  • tuberculosis
  • polio
  • typhoid
  • malaria

  • 9. 
    Which cannot fix atmospheric nitrogen in the soil?

  • Rhizobium
  • Clostridium
  • Azotobacter
  • Penicillin

  • 10. 
    The disease caused by fungi is

  • measles
  • chicken pox
  • polio
  • ringworm
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