What is the purpose of adding mineral oil to an O/F Media tube and why do we only put mineral oil in only one? Which sugars are typically tested in the phenol red broth? Can the phenol red test be also used to determine if a certain bacteria can metabolize various carbohydrates? Explain how conducting the MR/VP test too soon in a culture’s growth cycle can lead to false negatives? Generally, the color change we see in these tests is a result of what change in the media? Explain. What is the MR-VP results for coli and E. aerogenes?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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  1. What is the purpose of adding mineral oil to an O/F Media tube and why do we only put mineral oil in only one?
  2. Which sugars are typically tested in the phenol red broth? Can the phenol red test be also used to determine if a certain bacteria can metabolize various carbohydrates?
  3. Explain how conducting the MR/VP test too soon in a culture’s growth cycle can lead to false negatives?
  4. Generally, the color change we see in these tests is a result of what change in the media? Explain.
  5. What is the MR-VP results for coli and E. aerogenes?
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