What is the purpose of coloring micropipette tips? 3. Explain briefly how the choice of micropipettes can affect the experiment’s success? 4. If you wish to dial the volume of 781 ul on a micropipette, what are two options the micropipette can read for you? 5. A student in a microbiology lab was asked to transfer PBS solution from one Eppendorf tube to another. However, he noticed the formation of bubbles in the tube. Explain briefly what could have possibly caused the bubbles formation and how to solve this issue. 6. The same student was asked to transfer bacillus bacteria (white) and staphylococcus (orange) bacteria to separate bottles. The second day he came to check the bottles, he found that orange bacteria was growing in both bottles. What mistake has this student made in this case?

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