MCQ
Restriction endonucleases are used as:
- AMolecular build up at nucleotides
- BMolecular degradation to break up a DNA
- CMolecular knives for cutting DNA at specific sites
- DMolecular cement to combine DNA sites
✓
Answer
- Molecular knives for cutting DNA at specific sites
Explanation:
Restriction endonucleases are enzymes that cleave the sugar-phosphate backbone of DNA. In most practical settings, a given enzyme cuts both strands of duplex DNA within a stretch of just a few bases. Several thousand different restriction endonucleases have been isolated, which collectively exhibit a few hundred different sequence (substrate) specificities.
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