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What can the presence of uncut plasmid after restriction digestion indicate?

Answer and explanation

Correct answer: Incomplete digestion

When a plasmid sample is treated with a restriction enzyme, complete digestion at the relevant site should convert every suitable plasmid molecule into the expected cut form. If a band corresponding to uncut plasmid remains, at least some molecules were not cleaved. This may indicate incomplete digestion caused by insufficient enzyme, unsuitable buffer, incorrect incubation conditions, too little time, or a missing recognition site in that plasmid preparation. Thus option A is the best interpretation. The observation does not demonstrate photosynthesis, RNA translation or protein digestion; those processes are unrelated to restriction analysis. Additional controls can help distinguish incomplete cutting from different plasmid conformations.

Related tags

Uncut PlasmidIncomplete DigestionRestriction AnalysisRestriction EnzymesPrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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