3.1.3: Exercise #12 - Lab Wrap-Up

OER - BIOL 2420 Laboratory Manual · LibreTexts

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    Lab Wrap-Up Questions
    Answer the following questions:
    1. What information is determined regarding a bacterial cell after the carbohydrate fermentation test has been performed?
    2. Why is it important to have only one sugar present in a single phenol red broth tube?
    3. What ingredient allows for the detection of fermentation? What is the reagent detecting in the media?
    4. How is the production of gas detected in a carbohydrate fermentation test?
    5. Describe the appearance of a positive result in the carbohydrate fermentation test. What has occurred during the test to result in the positive result?
    6. Why is it important to check the results of the test at 24 hours and not wait for a longer period of time?

    This page titled 3.1.3: Exercise #12 - Lab Wrap-Up was last modified on Sat, 25 Jul 2026 03:42:57 GMT and is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by Sherry Smith.