Kohler and Milstein developed biotechnology for the production of

List the advantages of recombinant insulin.

Abnormal genes are replaced by normal genes through:

Hybridoma cells are .....

In $1983$,Eli Lilly,an American company,first prepared two $DNA$ sequences corresponding to $A$ and $B$-chains of human insulin and introduced them into the plasmids of $Escherichia$ $coli$ to produce insulin chains. Chains $A$ and $B$ were prepared separately,extracted,and combined by creating:

From which organism was insulin extracted in earlier times?