1. 70-75% ethanol is the most common disinfectant/sterilizing-sanitizing agent used in a microbiology laboratory. Explain why 70-75% ethanol is more effective than 95-99% ethanol. (5 marks).
2. List TWO GLPs and discuss its importance. (5 marks).
3. Why should Good Laboratory Practices be followed strictly? State TWO reasons. (5 marks).
4.What does ISO stand for? What is its significance?
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