The first clinical application of gene therapy was used in $1990$ on a four-year-old girl for:

$A$ patient is suffering from $ADA$ deficiency. Can he be cured? How?

$ELISA$ is used to detect viruses where the key reagent is . . .

Consider the following statements about insulin.
$I.$ Human insulin is made up of $51$ amino acids arranged in two polypeptide chains.
$II.$ The two polypeptide chains are interconnected by two disulphide bridges.
$III.$ In mammals,including humans,insulin is synthesised as a pro-hormone,which contains an extra stretch called the $C$-peptide.
$IV.$ $C$-peptide is not present in the mature insulin.
Which of the statements given above are correct?

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

Applications,like bioremediation,processed food,therapeutics and diagnostics are related with