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If a DNA sample has RNA contamination what is generally the main effect on restriction digestion?

Answer and explanation

Correct answer: Accurate DNA quantification can be confused

The governing concept is interference with sample measurement and composition. RNA also absorbs ultraviolet light near 260 nm, so a mixed DNA-RNA preparation can give an inflated or misleading estimate of nucleic-acid concentration. If the operator assumes that all measured material is DNA, the amount of DNA added to the restriction reaction may be miscalculated, affecting enzyme-to-substrate balance and interpretation. Therefore option B is the best answer. RNA contamination does not mean that a DNA restriction enzyme will completely cut RNA, and it cannot make a gel permanently fail. Restriction enzymes cut specific DNA recognition sites; they do not join DNA. RNase treatment or an appropriate cleanup can improve the sample before digestion.

Related tags

Rna ContaminationDna QuantificationCleanupCutting Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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