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Why can small primer-like fragments be problematic in restriction digestion product?

Answer and explanation

Correct answer: They can cause unwanted competition in ligation

The governing concept is competition among DNA molecules during ligation. Small primer-like fragments may possess ends that are compatible with the vector or insert ends. DNA ligase can therefore join these unwanted fragments, or they can consume compatible ends and ligation capacity, lowering the proportion of the desired recombinant product. Option A is correct. Option B is biologically impossible because a DNA fragment does not turn into an enzyme. Option C is incorrect because a vector origin is a defined replication-control sequence, not simply any small fragment. Option D confuses DNA with a staining reagent. Removing very small products by size selection or cleanup improves the specificity of the subsequent cloning reaction.

Related tags

Small FragmentsLigation CompetitionCleanupCutting Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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