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Why are fresh sterile tips used in restriction digestion?

Answer and explanation

Correct answer: To reduce contamination and sample mix-up

Restriction digestion is a sensitive reaction in which the DNA sample must remain chemically and biologically clean. A fresh sterile pipette tip helps prevent carryover of DNA from another tube, restriction enzyme from an earlier reaction, salts, or nucleases that could degrade the sample. Using a new tip for each reagent and sample also reduces cross-contamination and the chance of mixing up clones, which could create a misleading band pattern. The tip itself does not make DNA into protein, colour an enzyme, or heat a gel. Therefore option A correctly describes the practical reason for using fresh sterile tips.

Related tags

Sterile TipsContaminationRestriction DigestionCutting Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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