Lecture 2a: Cell Structure & Function

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Last updated 1:41 AM on 8/20/26
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14 Terms

1
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Simple staining

1 day used to color specimen

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Chromophore

colored portion of a dye

3
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basic dye

  • positive charged chromophore

  • binds to negative charge molecule on cell surface


4
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acidic dye

  • has negatively charged chromophore

  • repelled by cell surface

  • stains background


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Gram Stain

separates bacteria into 2 groups based on cell wall surface

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Gram positive stain

cells retain a primary stain

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Gram negative

cells lose the primary stain adn take color of counterstain

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<p>Which side is gram <strong>positive </strong></p>

Which side is gram positive

Left

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<p>which side is gram <strong>negative</strong> </p>

which side is gram negative

Right

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14
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