The first restriction enzyme to be isolated and characterised was

Identify the desirable characteristics for a plasmid used in $rDNA$ technology from the following.
$A$. Ability to multiply and express outside the host in a bioreactor.
$B$. $A$ highly active promoter
$C$. $A$ site at which replication can be initiated
$D$. One or more identifiable marker genes
$E$. One or more unique restriction sites.

Agrobacterium tumefaciens contains a large plasmid that induces tumors in plants,known as:

To isolate $DNA$ from fungal cells,bacterial cells,and plant cells,the enzymes required are respectively:

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:

Genetic engineering is possible,because