Explain why viruses are not living organisms

1.a)Outline the contributions of Louis Pasteur to modern microbiology (5 marks)
b)Describe how microorganism benefit agriculture. (6 marks)
c)Explain the distinguishing characteristics between eukaryotic and prokaryotic cells. (10 marks)
d)Explain why viruses are not living organisms (4 marks)

2.a)Explain the use of the following in microbiology laboratory:
i)Autoclave (2 marks)
ii)Constant temperature water bath. (2 marks)
iii)70% ethanol (2 marks)
b)Describe the three methods of sterilization that use moist heat. (10 marks)
c)With the aid of diagrams,describe the steak-plate technique of isolation and purifying bacteria into pure culture. (9 marks)








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