The thermostable enzymes $Taq$ and $Pfu$ are isolated from thermophilic bacteria,which are used as:

Genetic engineering is possible,because

Give scientific reasons: In recombinant $DNA$ technology,the use of endonuclease is more proper than exonuclease.

Two enzymes responsible for restricting the growth of bacteriophages in $E. coli$ were isolated. One was methylase and the other was restriction endonuclease. What is the significance of methylase?

What is the specific recognition sequence of a restriction enzyme called?

In $EcoR\, I$,what do the letters $E$ and $R$ stand for,respectively?