In bacteria,a plasmid is .........

The two antibiotic resistance genes on vector $pBR322$ are for

Restriction endonuclease enzymes are used to:

Which part of $Agrobacterium$ $tumefaciens$ is pathogenic?

Which of the following is used as the best genetic vector in plants?

The key tools required for the recombinant $DNA$ technology are:
$I.$ Restriction enzymes
$II.$ Polymerase enzymes
$III.$ Ligases
$IV.$ Vectors
$V.$ Host organisms
Select the correct option.