NCERT Solutions For Class 8 Science Chapter 2 Microorganisms Friend And Foe MCQs

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NCERT Solutions For Class 8 Science Chapter 2 Microorganisms Friend And Foe Multiple Choice Questions

Question 1. Yeast is used in the production of

  1. Sugar
  2. Alcohol
  3. Hydrochloride Acid
  4. Oxygen

Answer: 2. Alcohol is produced by the action of yeast.

Question 2. The following is an antibiotic

  1. Sodium Bicarbonate
  2. Streptomycin
  3. Alcohol
  4. Yeast

Answer: 2. Streptomycin is an antibiotic.

NCERT Solutions for Microorganisms Friend and Foe MCQs

Question 3. Carriers of the malaria-causing protozoan are

  1. Female Anopheles mosquito
  2. Cockroach
  3. Housefly
  4. Butterfly

Answer: 1. The Female Anopheles mosquito is the carrier of malaria. It picks up the parasite of the disease from an infected person when it bites to obtain blood.

MCQ On bacteria, Fungi, Viruses, Protozoa, Algae, Class 8 Science

Question 4. The most common carrier of communicable diseases is

  1. Ant
  2. Housefly
  3. Dragonfly
  4. Spider

Answer: 2. The Housefly is the most common carrier of communicable disease.

NCERT Solutions For Class 8 Science Chapter 2 Microorganisms Friend And Foe MCQs

Question 5. The bread or idle dough rises because of

  1. Heat
  2. Grinding
  3. Growth of yeast cells
  4. Kneading

Answer: 3. The bread or idli dough rises because of the growth of yeast cells.

Question 6. The process of converting sugar into alcohol is called

  1. Nitrogen fixation
  2. Moulding
  3. Fermentation
  4. Infection

Answer: 3. Fermentation is the process of conversion of sugar into alcohol.

NCERT Class 8 Science Chapter 2 Microorganisms MCQs

Question 7. The growth of white patches that develop on moist brood during rainy nonson are

  1. Fungi
  2. Potozoan
  3. Bacteria
  4. Virus

Answer: 1. Fungi

NCERT Solutions For Class 8 Science Chapter 2 Microorganisms Friend And Foe Multiple Choice Questions

Question 8. Diseases like dysentery and malaria are caused by

  1. Protozoans
  2. Algae
  3. Fungi
  4. Bacteria

Answer: 1. Protozoans

Question 9. Spirogyra is

  1. An algae
  2. A fungi
  3. A bacteria
  4. A protozoan

Answer: 1. An alga

Question 10. Chlamydomonas and Amoeba are examples of

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

Answer: 3. Algae And Protozoan

NCERT Solutions for Class 8 Science Microorganisms MCQs

Question 11. Which of the following reproduces only inside a host cell?

  1. Bacteria
  2. Virus
  3. Amoeba
  4. Fungus

Answer: 2. Virus

Microorganisms Friend and Foe MCQ Class 8

Question 12. A disease in human beings caused by the virus is

  1. Typhoid
  2. Influenza
  3. Dysentery
  4. Cholera

Answer: 2. Influenza

Microorganisms: Friend and Foe MCQs with Solutions Class 8

Question 14. Polio and measles are examples of

  1. Viral Diseases
  2. Bacterial Diseases
  3. Protozoan Diseases
  4. Fungal Diseases

Answer: 1. Viral Diseases

Question 15. The spoiling of food is a change.

  1. Physical
  2. Chemical
  3. Natural
  4. Biogeochemical

Answer: 2. Chemical

Question 16. Which of the following does not fix atmospheric nitrogen?

  1. Nostoe
  2. Anabaena
  3. Rhizobium
  4. Amoeba

Answer: 4. Amoeba

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