Mention the importance of Recombinant $DNA$ technology in terms of vaccination.

Which of the following is/are correct about Adenosine Deaminase $(ADA)$ deficiency?
$I$. In the absence of adenosine deaminase enzyme,purine metabolism is disturbed and $T$-lymphocytes fail to function.
$II$. $ADA$ deficiency is caused by the deletion of the gene for $ADA$.
$III$. In some cases,it can be cured by bone marrow transplantation and enzyme replacement therapy. But in both approaches,the patients are not completely cured.
$IV$. For permanent cure,genes isolated from the bone marrow cells producing $ADA$ at early embryonic stages can be a possible cure.
Which of the above statements are correct?

The name of the drug used in cancer treatment produced by biotechnology is:

The first biochemical to be produced commercially by microbial cloning and genetic engineering is:

Hepatitis $B$ vaccine is produced by.......

In what form is human insulin synthesized,and what does it contain?