Chapter 2 Microorganisms – Friend and Foe MCQ for Class 8

Microorganisms – Friend and Foe MCQ for Class 8 is an important part of your Science exam preparation. In this chapter, you learn how tiny living things like bacteria, fungi, protozoa, and algae can be both useful and harmful. To make your revision easier, we have created Class 8 Science Chapter 2 MCQs with answers. These multiple-choice questions will help you test your knowledge, practice important concepts, and prepare for school exams. By solving these objective questions, you can improve your speed, accuracy, and confidence in Class 8 Science.

Microorganisms – Friend and Foe MCQ Class 8

Prepare for your exams with Microorganisms – Friend and Foe MCQ Class 8 based on NCERT Science Chapter 2. These Class 8 Science Chapter 2 MCQs with answers help you practice important concepts about useful and harmful microorganisms. From topics like curd formation, nitrogen fixation, antibiotics, and diseases caused by microbes, our Class 8 Microorganisms objective questions make revision simple and exam-ready. Solve these NCERT Class 8 Science Chapter 2 multiple choice questions to improve your speed, accuracy, and confidence for school tests and annual exams.

Class 8 Science Chapter 2 MCQ with Answers

Q1. Which of the following is not a microorganism?
(a) Bacteria
(b) Algae
(c) Mushroom
(d) Virus
Answer: (c) Mushroom

Q2. Which microorganism is used in the production of alcohol?
(a) Lactobacillus
(b) Yeast
(c) Virus
(d) Amoeba
Answer: (b) Yeast

Q3. Which microorganism causes malaria?
(a) Plasmodium
(b) Lactobacillus
(c) Rhizobium
(d) Aspergillus
Answer: (a) Plasmodium 

Q4. Name the microorganism that helps in nitrogen fixation.
(a) Rhizobium
(b) Plasmodium
(c) Yeast
(d) E. coli
Answer: (a) Rhizobium

Q5. Which of the following diseases is not caused by bacteria?
(a) Tuberculosis
(b) Typhoid
(c) Cholera
(d) Malaria
Answer: (d) Malaria

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Q6. Which microorganism is used in the production of antibiotics?
(a) Virus
(b) Fungi
(c) Bacteria
(d) Both (b) and (c)
Answer: (d) Both (b) and (c)

Q7. Which microorganism is used in the making of curd?
(a) Yeast
(b) Lactobacillus
(c) Plasmodium
(d) Rhizobium
Answer: (b) Lactobacillus

Q8. Which microorganism is used in the production of vaccines?
(a) Weakened or dead microbes
(b) Viruses only
(c) Algae
(d) Protozoa
Answer: (a) Weakened or dead microbes

Q9. Which microorganism is responsible for the disease anthrax?
(a) Bacillus anthracis
(b) Plasmodium
(c) Lactobacillus
(d) Amoeba
Answer: (a) Bacillus anthracis

Q10. Which microorganism spoils pickles, bread, and other food items?
(a) Yeast
(b) Fungi
(c) Rhizobium
(d) Amoeba
Answer: (b) Fungi

Q11. Which microorganism spoils bread as black patches?
(a) Rhizopus
(b) Aspergillus
(c) Yeast
(d) Amoeba
Answer: (a) Rhizopus

Q12. Which microorganism is used in baking bread?
(a) Yeast
(b) Algae
(c) Rhizobium
(d) Plasmodium
Answer: (a) Yeast

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Q13. Which microorganism helps in nitrogen fixation?
(a) Yeast
(b) Rhizobium
(c) Amoeba
(d) Aspergillus
Answer: (b) Rhizobium

Q14. Which microorganism is responsible for food poisoning?
(a) Salmonella
(b) Rhizobium
(c) Plasmodium
(d) Yeast
Answer: (a) Salmonella

Q15. Which of the following is used in the production of antibiotics like penicillin?
(a) Yeast
(b) Virus
(c) Fungi
(d) Protozoa
Answer: (c) Fungi

Q16. Which microorganism causes tuberculosis?
(a) Streptococcus
(b) Mycobacterium
(c) Plasmodium
(d) Amoeba
Answer: (b) Mycobacterium

Q17. Which microorganism is used in the production of wine?
(a) Yeast
(b) Amoeba
(c) Lactobacillus
(d) Plasmodium
Answer: (a) Yeast

Q18. Which microorganism causes sleeping sickness?
(a) Plasmodium
(b) Trypanosoma
(c) Salmonella
(d) E. coli
Answer: (b) Trypanosoma

Q19. Which microorganism is responsible for cholera?
(a) Plasmodium
(b) Vibrio cholerae
(c) Salmonella
(d) Lactobacillus
Answer: (b) Vibrio cholerae

Q20. Which microorganism is responsible for typhoid?
(a) Salmonella typhi
(b) Mycobacterium
(c) Bacillus anthracis
(d) Rhizobium
Answer: (a) Salmonella typhi

Q21. Which microorganisms can only reproduce inside a host?
(a) Bacteria
(b) Viruses
(c) Fungi
(d) Algae
Answer: (b) Viruses

Q22. Which microorganism is used in the preparation of antibiotics?
(a) Penicillium notatum
(b) Amoeba
(c) Plasmodium
(d) Lactobacillus
Answer: (a) Penicillium notatum

Q23. Which microorganism is used to clean oil spills?
(a) Algae
(b) Bacteria
(c) Fungi
(d) Protozoa
Answer: (b) Bacteria

Q24. Which microorganism causes leprosy?
(a) Mycobacterium leprae
(b) Plasmodium
(c) Rhizobium
(d) Bacillus anthracis
Answer: (a) Mycobacterium leprae

Q25. Which microorganism is helpful in producing insulin by genetic engineering?
(a) Bacteria (E. coli)
(b) Algae
(c) Protozoa
(d) Virus
Answer: (a) Bacteria (E. coli)

Q26. Which microorganism causes measles?
(a) Virus
(b) Bacteria
(c) Fungi
(d) Protozoa
Answer: (a) Virus