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Homework answers / question archive / In this study, cancerous and normal skin tissue samples were excised with a scalpel
In this study, cancerous and normal skin tissue samples were excised with a scalpel. Each skin sample was then placed into a sample tube along with solvent, shaken on a vortex and centrifuged. When the sample tubes came out of the centrifuge, there was a top layer and a bottom layer. For our purposes, we went on to use ______________ for further processing."
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only the bottom layer |
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none of the options listed |
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a mixture of top and bottom layers |
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only the top layer |
