Microorganisms: Friend and Foe - Class 8 Quiz

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1. Which of the following is NOT a microorganism?

Bacteria
Amoeba
Mushroom
Virus

2. Yeast is used in the production of:

Sugar
Alcohol
Salt
Oxygen

3. Microorganisms are classified into how many major groups?

Two
Four
Five
Six

4. Which microorganism is used to make antibiotics?

Virus
Fungi
Algae
Protozoa

5. Which disease is caused by a virus?

Malaria
Tuberculosis
Polio
Typhoid

6. Vaccines protect us from:

Animals
Fungal Infections
Infectious Diseases
Plant Diseases

7. Which microorganism is used in nitrogen fixation?

Fungi
Bacteria
Virus
Protozoa

8. The process of converting milk into curd involves:

Protozoa
Virus
Bacteria
Algae

9. Which of these is a harmful microorganism?

Rhizobium
Lactobacillus
Plasmodium
Penicillium

10. Which microorganism spoils food?

Yeast
Bacteria
Virus
Algae

11. Bread dough rises due to:

Bacteria
Yeast
Protozoa
Algae

12. Penicillin was discovered by:

Louis Pasteur
Robert Koch
Alexander Fleming
Edward Jenner

13. Which of these diseases is caused by bacteria?

Typhoid
Influenza
Polio
Malaria

14. Edward Jenner developed the vaccine for:

Polio
Smallpox
Tuberculosis
Cholera

15. Which microorganism can survive in extreme conditions?

Fungi
Algae
Archaebacteria
Virus

16. Which microorganism causes malaria?

Virus
Bacteria
Plasmodium
Fungi

17. Which product is made with the help of microorganisms?

Cheese
Bread
Curd
All of these

18. Which microorganism is used in sewage treatment?

Fungi
Algae
Bacteria
Virus

19. Which microorganism causes COVID-19?

Bacteria
Virus
Protozoa
Algae

20. Which group includes only microorganisms?

Algae, Fungi, Plants
Fungi, Protozoa, Bacteria
Bacteria, Animals, Protozoa
Virus, Insects, Fungi

21. Which microorganism converts atmospheric nitrogen into usable form?

Virus
Rhizobium
Protozoa
Algae

22. Which food is fermented by yeast?

Idli
Cheese
Pickles
Beer

23. Microorganisms that cause disease are called:

Decomposers
Pathogens
Symbionts
Algae

24. Which microorganism produces oxygen during photosynthesis?

Bacteria
Fungi
Algae
Virus

25. Which of these diseases spreads through contaminated water?

Cholera
Tuberculosis
Polio
Measles

26. Which of the following is an example of protozoa?

Rhizobium
Paramecium
Penicillium
Algae

27. Which microorganism is helpful in cleaning oil spills?

Algae
Bacteria
Virus
Fungi

28. Bread mould belongs to which group?

Virus
Bacteria
Fungi
Protozoa

29. Which microorganism reproduces only inside host cells?

Bacteria
Virus
Protozoa
Algae

30. Which is a viral disease?

Tuberculosis
Cholera
Influenza
Typhoid