Which one of the following genes is defective in patients suffering from Severe Combined Immunodeficiency Disease $(SCID)$?

Which of the following peptides is $NOT$ present in mature human insulin?

$P -$ Methods capable of early diagnosis
$Q -$ Methods not capable of early diagnosis
$I - rDNA$ technology $\quad II -$ Serum analysis $\quad III - PCR$
$IV -$ Urine analysis $\quad V - ELISA$
Select the correct option for $P$ and $Q$.
$P\quad\quad Q$

Which kind of therapy was given in $1990$ to a four-year-old girl with adenosine deaminase $(ADA)$ deficiency?

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 techniques serves the purpose of early diagnosis of $AIDS$,cancer,etc?
$I$. Polymerase chain reaction
$II$. Recombinant $DNA$ technology
$III$. Enzyme-linked immunosorbent assay
Choose the correct option.