A) enzymes that restrict uncontrolled growth of cell, which results in cancer
B) enzymes that restrict DNA synthesis to the minimum necessary level and prevent polyploidy
C) enzymes that cleave phosphodi ester linkages in DNA only at a specific sequence yielding fragments of reproducible sizes
D) enzymes that cleave polycistronic m-RNA to yield individual cisirons
Correct Answer: C
Solution :
Restriction enzymes are the enzymes that cleave phosphodiester linkages in DNA only at a specific sequence (.ie, ai specific sites) yielding fragments of reproducible sizes. Restriction endonucleases are also called as 'molecular scissors'.
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