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What problem can occur with very harsh mixing in alkaline lysis?

Answer and explanation

Correct answer: Chromosomal DNA can shear and increase contamination of plasmid DNA

After cell lysis, vigorous vortexing or pipetting can shear the long chromosomal DNA into small fragments. These fragments may remain in solution and co-purify with plasmid DNA, increasing genomic DNA contamination. A plasmid cannot turn into protein, and ethanol cannot become DNA. Exam tip: during plasmid isolation, mix by gentle inversion rather than harsh vortexing.

Related tags

Alkaline LysisPlasmid IsolationChromosomal Dna ContaminationGenomic DnaShear ForceRecombinant Dna TechnologyIsolation Of DnaProcesses Of Recombinant Dna Technology

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