Which of the following is commonly used as a vector for introducing a $DNA$ fragment in human lymphocytes?

The first hormone prepared by genetic engineering is:

How many of the following statements are incorrect?
$I.$ Genes of Agrobacterium are used to produce humulin.
$II.$ Indian government has set up $\text{GEAC}$.
$III.$ $\alpha-1$-antitrypsin is used to treat $\text{PKU}$.
$IV.$ $\text{ELISA}$ serves the purpose of early diagnosis.
$V.$ Flavr-savr is a variety of pomato.

Which of the following is a correct statement with respect to animal insulin?

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?

$A$: Recombinant $DNA$ technology is less effective in therapeutic drug production.
$R$: Recombinant therapeutics induce unwanted immunological responses.