CBSE Class 8 Science Chapter 2 Microorganisms Friend And Foe MCQs

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CBSE Class 8 Science Chapter 2 Microorganisms: Friend And Foe Multiple Choice Questions

Question 1. The two microorganisms that live in symbiotic association in lichens are

  1. Fungus And Protozoan
  2. Algae And Bacteria
  3. Bacteria And Protozoan
  4. Algae And Fungi

Answer: 4. Algae And Fungi

Question 2. The gas released during the preparation of bread is

  1. Oxygen
  2. Nitrogen
  3. Carbon Dioxide
  4. Sulphur Dioxide

Answer: 2. Nitrogen

Read And Learn More CBSE Class 8 Science Multiple Choice Questions

” CBSE Class 8 Science Chapter 2 MCQs “

Question 3. Alcohol is produced with the help of 

  1. Sodium Chloride
  2. Yeast
  3. Nitrogen
  4. Carbon Dioxide

Answer: 2. Yeast

Question 4. Scientist who discovered fermentation?

  1. Alexander Fleming
  2. Louis Pasteur
  3. Johann Mendel
  4. Charles Darwin

Answer: 2. Louis Pasteur

” Microorganisms Friend and Foe Class 8 “

Question 5. Pathogenic microorganisms present in host cells are killed by medicines called

  1. Pain killer
  2. Antibodies
  3. Antibiotics
  4. Vaccines

Answer: 3. Antibiotics

CBSE Class 8 Science Chapter 2 Microorganisms Friend And Foe MCQs

” Fermentation process Class 8 “

Question 6. Which of the elements is mixed with the feed of livestock and poultry to check microbial Infection In animals?

  1. Vaccine
  2. Antibiotic
  3. Yeast
  4. Alcohol

Answer: 2. Yeast

Question 7. Antibiotics are not effective against

  1. Cold And Flu
  2. Tuberculosis
  3. Cholera
  4. Typhoid

Answer: 1. Cold And Flu

Question 8. Edward Jenner discovered the vaccine for

  1. Smallpox
  2. Chicken Pox
  3. Tuberculosis
  4. Diphtheria

Answer: 1. Smallpox

” Antibiotics and their uses Class 8 “

CBSE Class 8 Science Chapter 2 Microorganisms Friend And Foe Multiple Choice Questions

Question 9. Polio drops given to children are a

  1. Bacteria
  2. Algae
  3. Vaccine
  4. Medicine

Answer: 3. Vaccine

Question 10. A female Anopheles mosquito carries the parasite of

  1. Dengue
  2. Cholera
  3. Malaria
  4. Tuberculosis

Answer: 2. Cholera

” Vaccines and their importance “

Question 11. Dengue fever is transmitted by

  1. Female Aedes Mosquito
  2. Housefly
  3. Female Anopheles Mosquito
  4. Sandfly

Answer: 1. Female Aedes Mosquito

Question 12. The disease caused by a protozoan and spread by an insect is

  1. Dengue
  2. Malaria
  3. Polio
  4. Measles

Answer: 2. Malaria

Question 13. An example of a bacterial disease occurring in animals is

  1. Foot And Mouth Disease
  2. Bird Flu
  3. Anthrax
  4. Swine Flu

Answer: 3. Anthrax

” Diseases caused by microorganisms “

Question 14. Anthrax is caused by

  1. Bacillus anthracis
  2. Salmonella
  3. Clostridium
  4. Aspergillus

Answer: 1. Bacillus anthracis

Cbse Class 8 Science Microorganisms Friend And Foe Mcq With Answers

Question 15. Citrus canker is a common disease of

  1. Human
  2. Plant
  3. Animal
  4. Fungi

Answer: 2. Plant

” Louis Pasteur and fermentation “

Question 16. Payal dug two pits, A and Bin her garden. In pit A, she put a polythene bag packet with some agricultural waste. In pit B, she dumped the same kind of waste, but without packingit in a polythene bag. She then covered both the pits with soil. What did she observe after a month?

  1. Waste in pit A degraded faster than that in pit B
  2. Waste in pit B degraded faster than that in pit A
  3. Waste in both pits degraded almost equally
  4. Waste in both pits did not degrade at all

Answer: 2. Waste in pit B degraded faster than that in pit A

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