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What happens if EDTA is high in restriction enzyme reaction?

Answer and explanation

Correct answer: Enzyme activity may decrease due to chelation of magnesium ions

EDTA is a chelating agent that binds \,\(Mg^{2+}\) ions. Most restriction endonucleases require \,\(Mg^{2+}\) as a cofactor to cut DNA. When EDTA is present in excess, free magnesium becomes unavailable, so DNA-cleaving activity may decrease or stop. Option D is incorrect because restriction enzymes generally cannot function efficiently without the required cofactor. Exam tip: Remember the role of \,\(Mg^{2+}\) in restriction-enzyme buffers.

Related tags

Restriction EnzymesEdtaMagnesium IonsDna DigestionRecombinant Dna TechnologyCutting Of DnaProcesses Of Recombinant Dna TechnologyBiotechnology

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