The "molecular scissors" used in genetic engineering is

Which restriction enzyme recognizes the given palindromic sequence?
$5^{\prime} ----- GAATTC ----- 3^{\prime}$
$3^{\prime} ----- CTTAAG ----- 5^{\prime}$

Which one is a true statement regarding $DNA$ polymerase used in $PCR$?

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

Insertional inactivation is performed by which enzyme?

In gel electrophoresis, the separated $DNA$ fragments can be visualized only after staining the $DNA$ with a compound known as ............. followed by exposure to $UV$ radiation.