eVidyarthi

MCQ Science and Technology Class 9 Chapter 8 Maharashtra Board

Useful and Harmful Microbes

1. Why is oil used to cover pickles in jars?

Question 1 of 20

2. Why is salt applied to the inner surface of pickle jars?

Question 2 of 20

3. Which microbe is present in yoghurt?

Question 3 of 20

4. Which microbe is used in bread production?

Question 4 of 20

5. Which microbe resides in the root nodules of leguminous plants?

Question 5 of 20

6. Which microbe is found in spoiled potato curry?

Question 6 of 20

7. Which disease is the odd one out among pneumonia, diphtheria, chicken pox, and cholera?

Question 7 of 20

8. Which microbe is the odd one out among Lactobacilli, Rhizobia, Yeast, and Clostridia?

Question 8 of 20

9. Why does foam form on ‘dal’ kept for a long time in summer?

Question 9 of 20

10. Why are naphthalene balls used with stored clothes?

Question 10 of 20

11. Which antibiotic treats bacterial infections of the ear?

Question 11 of 20

12. What should be done if you feel well before finishing an antibiotic course?

Question 12 of 20

13. What is lichen, as described in the document?

Question 13 of 20

14. Why is bread more digestible than chapattis?

Question 14 of 20

15. Why is ethanol mixed with fuels like petrol in some countries?

Question 15 of 20

16. What do Yeast cells look like under a microscope?

Question 16 of 20

17. Which disease has been nearly eradicated in some countries due to antibiotics?

Question 17 of 20

18. What conditions do Clostridium bacteria require to grow?

Question 18 of 20

19. Which antibiotic is effective against a wide variety of bacteria?

Question 19 of 20

20. Why is safranin used in the Rhizobium activity?

Question 20 of 20

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