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Biology LibreTexts

21.3: Pre-lab Questions

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    1. Why are some bacteria Acid-Fast, and most others are not?
    2. Compare the decolorizer used in the Gram stain, with the one used in the Acid-Fast stain.
    3. Why is the Acid-Fast stain and important diagnostic tool?
    4. Color in the following diagram of bacteria (clear, pink, or blue) during the various stain steps:

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