MCQ Questions for Class 8 Science Chapter 2 Microorganisms – Friend and Foe
Here we are providing mcq questions for class 8 science. In this article, we are covering Class 8 Science Chapter 2 Microorganisms – Friend and Foe.
Table of Contents
Q1. Microorganisms are classified into major groups.
a) 2
b) 3
c) 4
d) 5
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Answer: (c)Q2. Penicillin is an antibiotic which is an extract from
a) Rhizobium.
b) Penicillium.
c) Aspergillus.
d) None of the above.
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Answer: (b)Q3. Smallest size microorganism is
a) Bacteria.
b) Fungi.
c) Virus.
d) Protozoa.
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Answer: (c)Q4. Virus behaves as microorganism at
a) Inside the cell of the host.
b) Outside the cell of the host.
c) Inside and outside of the host.
d) It is not a microorganism.
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Answer: (a)Q5. Which one is a disease due to the presence of protozoa?
a) Typhoid.
b) Malaria.
c) AIDS.
d) TB
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Answer: (b)Q6. A helpful virus is called
a) Phage Virus.
b) Bacterium.
c) Vector.
d) The virus never helps us.
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Answer: (a)Q7. Which one is a bacterial disease?
a) Typhoid.
b) Malaria.
c) AIDS.
d) Dysentery.
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Answer: (a)Q8. Disease causing microorganisms are also known as
a) Pathogen.
b) Cyanogen.
c) Carcinogen.
d) Vector.
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Answer: (a)Q9. Tiny black rounded structure found on spoiled bread pieces are
a) Bacteria.
b) Fungi.
c) Virus.
d) Protozoa.
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Answer: (b)Q10. Full form of TB is
a) Tuberculosis Bacteria.
b) Tuberculosis Bacterium.
c) Tuberculosis.
d) Tumour Bacterium.
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Answer: (b)Q11. Which is/are not correct regarding microorganisms
(1) Microorganisms can be seen by naked eyes.
(2) Microorganisms are classified into four major groups.
(3) Fungi are one type of microorganism.
(4) The virus is a special type of microorganism compared to the other three types.
a) Only 1.
b) 1 and 3.
c) 1 and 2
d) None of the above.
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Answer: (a)Q12. Viruses could reproduce inside the cell of
a) Plant body.
b) Human beings.
c) Bacterium.
d) All of the above.
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Answer: (d)Q13. For which disease antibiotics are not useful
a) Cold.
b) Flue.
c) AIDS.
d) All of the above.
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Answer: (d)Q14. Paramecium is a
a) Bacteria.
b) Fungi.
c) Virus.
d) Protozoa.
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Answer: (d)Q15. Which microorganism is beneficial to us
a) Agar-Agar
b) Amoeba.
c) Penicillium.
d) Both (a) and (c).
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Answer: (d)Q16. Only single-celled microorganisms is/are
(1) Bacteria.
(2) Virus.
(3) Protozoa.
(4) Fungi
a) Only 1.
b) 1 and 3.
c) 1 and 2
d) All of the above.
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Answer: (c)Q17. Which of the following is an example of external parasite?
a) Lice.
b) Roundworm.
c) Tapeworm.
d) All of the above.
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Answer: (a)Q18. Lactobacillus used to make curd, is an example of
a) Bacteria.
b) Virus.
c) Protozoa.
d) Fungi
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Answer: (a)Q19. Conversion of sugar to alcohol is carried out by the process called
a) Fixation.
b) Budding.
c) Vaccination.
d) Fermentation.
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Answer: (d)Q20. Aspergillus is a
a) Bacteria.
b) Fungi.
c) Virus.
d) Protozoa.
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Answer: (b)Q21. Which microorganism is used in the bakery industry?
a) Yeast.
b) Rhizobium.
c) Lactobacillus.
d) All of the above.
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Answer: (a)Q22. Spirogyra is a
a) Bacteria.
b) Fungi.
c) Virus.
d) Algae.
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Answer: (d)Q23. Which Microorganism increase soil fertility
a) Rhizobium.
b) Penicillium.
c) Aspergillus.
d) All of the above.
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Answer: (a)Q24. Antibiotics are generally produced from
a) Bacteria and Protozoa.
b) Fungi and Bacteria.
c) Virus and bacteria.
d) Fungi.
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Answer: (b)Q25. Which Microorganism used to make antibiotics
a) Rhizobium.
b) Penicillium.
c) Aspergillus.
d) All of the above.
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Answer: (b)Importance of Practicing MCQ Questions for Class 8 Science
Solving MCQs can be an effective way for class 8 science students to understand concepts better. Here are some ways in which solving MCQs can help students understand science concepts:
- Encourages active learning: MCQs require students to actively engage with the material and think critically about the concepts they are studying. Rather than simply memorizing information, students must analyze the options presented and choose the most appropriate answer. This helps to reinforce the material in their minds and encourage active learning.
- Provides immediate feedback: MCQs provide immediate feedback to students. When students answer a question incorrectly, they can learn from their mistakes and identify areas where they may need additional support. This feedback is crucial for helping students to identify gaps in their understanding and make corrections quickly.
- Promotes retention of information: MCQs can also help students retain information more effectively. By repeatedly reviewing and answering questions about a particular concept, students can reinforce their understanding of the material and commit it to memory more easily.
- Helps students to organize their knowledge: When students are presented with a series of MCQs on a particular topic, they must organize their knowledge of the subject and identify the most important information. This process helps them to develop a deeper understanding of the material and strengthens their ability to recall key facts and concepts.
- Improves test-taking skills: Finally, solving MCQs can help students develop better test-taking skills. By practicing MCQs, students can learn how to eliminate incorrect answer choices, manage their time effectively, and avoid common mistakes that can cost them points on tests and exams.
