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MCQ Science and Technology Class 9 Chapter 8 Maharashtra Board

Useful and Harmful Microbes

1. What shape do Lactobacilli bacteria have when observed under a microscope?

Question 1 of 20

2. Which process converts lactose into lactic acid in milk to form yoghurt?

Question 2 of 20

3. What causes milk proteins to coagulate during yoghurt formation?

Question 3 of 20

4. Why does yoghurt taste sour?

Question 4 of 20

5. What effect does the low pH in yoghurt have on harmful microbes?

Question 5 of 20

6. Which harmful bacteria in the alimentary canal are targeted by probiotic foods?

Question 6 of 20

7. Which milk product is produced by fermenting cream with Lactobacilli?

Question 7 of 20

8. What is Lactobacilli fermentation used for in large-scale production?

Question 8 of 20

9. What type of fodder is fermented with Lactobacilli for domestic cattle?

Question 9 of 20

10. Which process involving Lactobacilli is used to produce some types of bread?

Question 10 of 20

11. Where do Rhizobium bacteria reside in leguminous plants?

Question 11 of 20

12. What is the relationship between Rhizobium and leguminous plants called?

Question 12 of 20

13. What do Rhizobium bacteria provide to leguminous plants?

Question 13 of 20

14. What do Rhizobium bacteria gain from leguminous plants in symbiosis?

Question 14 of 20

15. Why are pulses rich in proteins?

Question 15 of 20

16. What is done with leguminous crop roots after harvesting to benefit soil?

Question 16 of 20

17. What is the process of coating seeds with Rhizobium before sowing called?

Question 17 of 20

18. What type of microbe is Yeast?

Question 18 of 20

19. What is the asexual reproduction method of Yeast?

Question 19 of 20

20. What type of cell does Yeast have?

Question 20 of 20

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