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What is the advantage of cutting both gene and plasmid with the same restriction enzyme?

Answer and explanation

Correct answer: Matching ends are produced

The governing concept is restriction-enzyme cleavage and complementary DNA ends. A restriction endonuclease recognises a particular nucleotide sequence and cuts DNA at or near that sequence. If the same enzyme cuts both the desired gene and the plasmid, the resulting fragments usually possess compatible, complementary sticky ends, or compatible blunt ends in some cases. These ends can align through base pairing, allowing DNA ligase to seal the sugar-phosphate backbone and form a recombinant plasmid. Thus option A is correct. Cutting does not make DNA disappear, fill a plasmid with water, or directly change protein colour. The joining step still requires suitable conditions and ligase.

Related tags

Restriction EnzymeSticky EndsRecombinant DnaRestriction EnzymesPrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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