Question

why restriction enzymes are are called molecular scissors?

Answer 1

Heya!!

Desirable gene is removed out from total DNA by using a special enzyme called Resrriction Endonuclease
they break DNA at specific site, so called molecular scissors. each restriction nuclease has it's own restriction site or recognition site

for eg:-

EcoR1 cut DNA at it's restriction site GAATTC

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Glad to help you !!!

Answer 2

restriction enzyme are called molecular scissors because it can cut DNA at specific base sequence