Microorganisms : friends or foes

1. What is the study of microorganisms called?
2. Who established the existence of bacteria? 
3. Name two protozoans. 
4. Give two examples of bacteria. 
5. Yeast is an example of ___________.
6. Viruses are unique. Justify the statement.
7. Viruses can be crystallisrd and stored in jars for years. Why?
8. Name the bacteria that helps in formation of curd.
9. What is the range of temperature in which microorganisms exhibit maximum growth? 
10. The curd kept at room temperature for longer duration makes the curd sour. Explain the statement.
11. Rahul had idli in his breakfast. He said to his mother, "you make very soft and fluffy idlis".
a) What according to you makes the idli soft and fluffy?
b) What is the process called? 
c) Which microorganism is used in the process?
12. Name the sugar present in leaves. 
13. Why does milk taste sweet? 
14. Define effluent. 
15. What is bioaugmentation? 
16. How does microorganisms present in alimentary canal help humans?
17. Name two antibiotics obtained from fungi. 
18. What are antibiotics? 
19. How does our body protect itself when a disease causing microorganisms enter the body? 
20. What are vaccines? Give two ways of administering vaccines. 
21. Where is Rhizobium found and what is its role? 
22. What is the role of cyanobacteria in the rice field? 
23. Name two chemicals produced by microorganisms which are used as fuel.
24. How is ethanol produced by the microorganisms? 
25. How do decomposers replenish nutrients to the ecosystem? 

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