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Why is integrity checked along with yield and purity in DNA isolation?

Answer and explanation

Correct answer: Because most of the DNA should remain intact and unbroken for use in downstream experiments

Yield indicates the amount of DNA, while purity indicates the absence of contaminants such as proteins, RNA, or other impurities. However, even a large amount of pure DNA may be degraded into small fragments. Checking integrity confirms whether the DNA is intact, high molecular weight, and suitable for downstream work such as PCR, restriction digestion, or cloning. Option B is incorrect because high yield does not prove that DNA is unbroken. Exam tip: remember yield, purity, and integrity as amount, freedom from contaminants, and intactness of DNA, respectively.

Related tags

Dna IsolationDna IntegrityDna YieldDna PurityDegradationRecombinant Dna TechnologyIsolation Of DnaProcesses Of Recombinant Dna Technology

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