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What can phenol contamination do in a restriction digestion?

Answer and explanation

Correct answer: It can inhibit restriction-enzyme activity

The governing concept is the effect of contaminants on enzyme-based reactions. Phenol is used during some nucleic-acid purification procedures, but residual phenol can remain with the recovered DNA if separation or washing is incomplete. This contaminant can interfere with protein structure or with the reaction environment, reducing or inhibiting restriction-enzyme activity. Therefore option A is correct, and incomplete digestion may appear as unexpected uncut or partially cut DNA on a gel. Phenol does not improve DNA quality after contamination, create a recognition sequence, or copy an enzyme. Those claims make options B, C, and D incorrect.

Related tags

Phenol ContaminationRestriction EnzymeDna CleanupCutting Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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