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Why is salt carryover a problem in a DNA sample?

Answer and explanation

Correct answer: It can inhibit downstream enzyme reactions such as PCR and restriction digestion

Salt remaining after DNA extraction can reduce the efficiency of enzyme-based reactions such as PCR, restriction digestion, and ligation. Excess salt interferes with suitable ionic conditions and proper enzyme activity. Therefore, wash steps are important for salt removal. Exam tip: In DNA-purity questions, remember that salt carryover mainly inhibits downstream enzymatic reactions.

Related tags

Dna IsolationSalt CarryoverDna PurificationPcrRestriction DigestionEnzyme InhibitionIsolation Of DnaProcesses Of Recombinant Dna Technology

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