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🩺 NEET🧬 Biology

The restriction enzymes are used in genetic engineering, because:

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The restriction enzymes are used in genetic engineering, because:
athey can cut DNA at specific base sequence.
bthey are nucleases that cut DNA at variable sites.
cthey can degrade harmful proteins.
dthey can join different DNA fragments.
✓ Correct answer: a) they can cut DNA at specific base sequence.
ExplanationRestriction enzymes, also known as molecular scissors, are essential in genetic engineering because they have the unique ability to cut DNA at specific base sequences.These enzymes recognize a particular sequence of nucleotides, usually a palindromic sequence, and break the phosphodiester bonds at that exact location.This precision allows scientists to isolate specific genes or create "sticky ends" that can later be joined with other DNA fragments.In contrast, they do not cut at variable sites, nor do they degrade proteins or join DNA; joining is the job of an enzyme called DNA ligase.
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