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When can PCR still be possible from a degraded DNA sample?

Answer and explanation

Correct answer: If the target DNA sequence is a short fragment

In degraded DNA, long molecules break into smaller fragments, but some short target sequences may remain intact. If the PCR target is short, both primer-binding sites may still occur on the same surviving fragment, allowing amplification of a short amplicon. If DNA is absent, there is no template for PCR. Exam tip: for degraded DNA, prefer shorter amplicons.

Related tags

Dna IsolationDegraded DnaPcrShort AmpliconPrimer Binding SitesIsolation Of DnaProcesses Of Recombinant Dna TechnologyBiotechnology

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