Microorganisms - Friend and Foe-Sample Papers

1.  What are food preservatives? Name some common food preservatives.

      2 marks

2.  Draw a systematic diagram of nitrogen cycle and explain it.

      4 marks

3.  Explain the process of Pasteurization in brief.

      3 marks

4.  Explain in detail how vaccination works?

      3 marks

5.  What are good microorganisms? Explain some of the uses of good microorganisms.

      2 marks

6.  Explain various types of bacteria.

      4 marks

7.  What are food poisoning and food preservation (short notes)?

      4 marks

8.  Explain the discovery of Penicillin.

      3 marks

9.  What are antibiotics? Explain with the help of examples.

      3 marks

10.  What are harmful microorganisms? Explain by giving the example of two diseasecarrying microbes.

          5 marks

11.  What are the indications required to detect spoilage in food?

          2 marks