1.5.3: Exercise #5 Lab Wrap-Up

OER - BIOL 2420 Laboratory Manual · LibreTexts

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    Lab Wrap-Up Questions
    Answer the following questions:
    1. You are performing an experiment that requires the use of skim milk agar. What chemical classification would this agar belong to? Explain your selection.
    2. What is the purpose of a streak plate?
    3. Examine the results of the streak plate in the image. Does this petri plate contain a pure culture or a mixed culture? Provide supporting evidence for your claim.
      Streak plate showing bacterial colony growth pattern used to evaluate culture purity.

      Figure 1. Streak plate used for evaluation of culture purity. Credit: Sherry Smith

    This page titled 1.5.3: Exercise #5 Lab Wrap-Up was last modified on Sat, 25 Jul 2026 03:43:14 GMT and is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by Sherry Smith.