Agarose,extracted from seaweeds,is used in:

Autonomously replicating circular extrachromosomal $\text{DNA}$ is called:

Which enzyme is used to join the ends of two strands of nucleic acid?

$A$ - Restriction endonucleases are also called 'molecular scissors'.
$R$ - When fragments generated by restriction endonucleases are mixed,they join together due to their sticky ends.

$A$ plasmid

Ligases catalyse the formation of bonds between