The Invisible Living World MCQs

The world around us is full of living things that we can see, like plants, animals, and people. But there is also another hidden world of tiny organisms that are too small to be seen with the naked eye. These are called microorganisms. They live in air, water, soil, and even inside our bodies. Some of them are useful to us – helping in making food, medicines, and enriching the soil – while others can be harmful and cause diseases. In this lesson, we explore this invisible living world and understand how it affects our daily lives.

Here you will have MCQs from The Invisible Living World with correct answers for practice.

Welcome to your The Invisible Living World MCQs

1.Which of the following is not a use of microorganisms?

2.Microorganisms can be seen with the help of a:

3. Which microorganism is used in the production of antibiotics?

4.Which of these is a viral disease?

5.Yeast is used in baking because it produces:

6.What is the role of microorganisms in the nitrogen cycle?

7.How do friendly microorganisms benefit humans?

8.Which of the following is true about vaccines?

9. What are microorganisms?

10. Which microorganism helps in bread making?

11. What microorganisms cause disease?

12.Which of the following is an example of a microorganism?

13. What is the primary role of yeast in bread making?

14. Which of the following is a beneficial use of microorganisms?

15.Microorganisms can only be harmful and have no beneficial uses.

16. Fungi and bacteria are used to make antibiotics like penicillin.

18. All bacteria are harmful to humans and other living organisms.

19. Preservation by sugar involves reducing the moisture content which inhibits bacterial growth.

20.Vaccines always contain live microorganisms to be effective.

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