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Class 8 Science Chapter 2 Microorganisms Friend And Foe Quiz 1 (25 MCQs)

Quiz Instructions

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1. Cold, influenza and most cough are caused by ..... ?
2. The pores in the bread is due to gas bubbles of
3. Which of the following is a mode of transmission for malaria and dengue?
4. The process of conversion of sugar into alcohol is .....
5. Milk is converted into powder by .....
6. Spyrogyra is
7. What do antibiotics do?
8. Which of the following bacterium is involved in the fixation of nitrogen in leguminous plants?
9. Which microorganism is used in the preparation of curd?
10. When left open, bread gets spoilt in the rainy season due to the accumulation of .....
11. Which cannot fix atmospheric nitrogen in the soil?
12. Bacteria are involved in making of cheese
13. Which of the following is a common carrier of disease-causing microbes?
14. The disease caused by fungi is .....
15. Which microorganism is responsible for causing malaria?
16. Diseases like cold, flu, chicken pox etc are caused by which microbe?
17. Cocci are ..... shaped bacteria.
18. Cholera is spread through .....
19. Which one of the following promotes the formation of curd
20. Which friendly microorganism lives in our intestine?
21. Name the nizime to be resiased by the organisms that helps uplide the fibers? Which Enzyme is Secreme is SCARTED BY BACYME IS SECTING OF THAT OF Flax The Ratting of Flax Flax Flax Fibras?
22. Which was the first antibiotic to be discovered
23. Yeast is NOT used for the production of:
24. Which among the following insects is vector of the Dengue virus
25. A bacteria that helps in the synthesis of vitamin B complex in our body is .....
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