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22 November, 12:09

How would a genetic engineer distinguish between the bacteria containing the new plasmid dna and those bacteria lacking this plasmid dna?

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  1. 22 November, 13:26
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    Normally a plasmid carries something that you can screen for. Most of the time this would be a gene that confers antibiotic resistance. For example many carry the gene that confers ampicillin resistance.

    If you transform bacteria with a plasmid, and plate on solid media that contains ampicillin, only those bacteria that took up the plasmid will be able to survive.
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