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26.5: Post-lab Questions

Bio 221Lab: Introduction to Microbiology · LibreTexts

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    From LibreTexts, under CC BY, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.

    1. Why is E. coli used as the test organism in water testing?
    2. Why isn’t it necessary to include a pH indicator in the lactose broth tubes?
    3. What is the MPN chart based on?
    4. We omitted the completed test. However, based on your results, what would you have expected to see in the completed test and gram stain?
    5. Why would water samples for the Membrane Filter Technique need to be fairly clear and not turbid?
    6. What tests that you did today were qualitative? Which were quantitative?
    7. Can media be sterilized by filtration? Explain your answer.

    This page titled 26.5: Post-lab Questions was last modified on Sat, 16 May 2026 01:31:58 GMT and is shared under a CC BY license and was authored, remixed, and/or curated by Kelly C. Burke.