Agarose is extracted from

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.

The given figure shows the $pBR322$ plasmid. Which of the following parts encodes the proteins involved in the replication of the plasmid?

In a genetic engineering experiment,restriction enzymes can be used for

Agarose,extracted from sea weeds,is used in which of the following?

$A$ plasmid without a selectable marker was chosen as a vector for cloning a gene. How does this affect the experiment?