3.4.7: Exercise #15 - Lab Wrap-Up

OER - BIOL 2420 Laboratory Manual · LibreTexts

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    Lab Wrap-Up Questions
    Answer the following questions:
    1. What test is performed to determine if members of the Enterobacteriaceae family can metabolize glucose producing neutral end products? How are those products detected in this test?
    2. What is the function of the enzyme citrate permease?
    3. Describe the appearance of a positive citrate test. Describe what has occurred in the media to cause the appearance?
    4. You perform a methyl red test on an unknown bacterial sample. Following the addition of the methyl red reagent you observe your sample and note that it is yellow in color. What does this tell you about the unknown bacterium?
    5. You perform a biochemical test in which you just added Kovac's reagent. You observe a red color at the top of the test tube. 1) What test has been performed? 2) Interpret the results of this test. 3) What does this tell you the bacterium that has been tested?

    This page titled 3.4.7: Exercise #15 - Lab Wrap-Up was last modified on Sat, 25 Jul 2026 03:42:59 GMT and is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by Sherry Smith.