By what other name is the gene gun known?

Which of the following methods are used for the analysis of Restriction Fragment Length Polymorphism $(RFLP)$?
$1$. Electrophoresis
$2$. Electroporation
$3$. Methylation
$4$. Restriction digestion

The $rop$ gene,which codes for the proteins involved in the replication of the plasmid $pBR322$ in $E. coli$,is located at the restriction site of:

In addition to $Taq$ polymerase enzyme,which other thermostable $DNA$ polymerases have been isolated to be used in Polymerase Chain Reaction $(PCR)$?

What is a palindromic sequence?

Which of the following is not used for isolation of $\text{DNA}$ from cells?