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What can be the advantage if two different DNA sources are cut with the same restriction enzyme?

Answer and explanation

Correct answer: They may produce similar compatible ends

The governing concept is compatibility of DNA ends during recombinant-DNA construction. A restriction endonuclease recognises a particular nucleotide sequence and cuts DNA at or near that recognition site. If the same enzyme cuts DNA from two different sources, the resulting fragments can possess matching cohesive, or sticky, ends when that enzyme makes staggered cuts. Their exposed single-stranded bases can temporarily pair by complementary base pairing. DNA ligase can then seal the sugar-phosphate backbone. Thus, option A is correct. The other options are biologically unrelated: cutting does not convert DNA into fat, does not make it emit light, and does not remove all DNA from the samples.

Related tags

Restriction EnzymesCompatible EndsRecombinant DnaPrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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