Q. Who discovered the molecular scissors, i.e, the restriction enzymes?
Solution:
- The Nobel Prize in Physiology or Medicine 1978 was awarded jointly to Werner Arber, Daniel Nathans and Hamilton O. Smith “for the discovery of restriction enzymes and their application to problems of molecular genetics.”
- Restriction enzyme, also called restriction endonuclease, a protein produced by bacteria that cleaves DNA at specific sites along the molecule.
- In the bacterial cell, restriction enzymes cleave foreign DNA, thus eliminating infecting organisms.
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