.......... works on the principle of antigen-antibody interactions.

The vaccine for Hepatitis-$B$ is produced from ...........

Kohler and Milstein developed biotechnology for the production of

How many of the following statements are correct?
$(i)$ Mature insulin is made up of $A, B$ and $C$ peptides.
$(ii)$ Removal of $C$-peptide helps in the maturation of insulin.
$(iii)$ In mature insulin,$C$-peptide is present.
$(iv)$ In insulin,chains $A$ and $B$ are linked by disulphide bonds.

Adenosine deaminase $(ADA)$ deficiency is most commonly caused by which genetic abnormality?

List the disadvantages of insulin obtained from the pancreas of slaughtered cows and pigs.