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Unformatted text preview: because we are studying microorganisms. Smearing is one of the most basic techniques in the lab, and it will build a foundation to more advance methods of studying microorganism. c. The gram stain is one of the most common stains, and it will allow us to differentiate between Gram negative bacteria and Gram positive bacteria. Gram positive bacteria have a thick cell wall that retains the violet dye better. Gram negative bacteria have a thinner cell wall and a lipopolysaccharide layer, which turns pink during the Gram stain....
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- Spring '08