Somatostatin or human growth hormone $(HGH)$ was first genetically isolated by:

Consider the following statements about therapeutic drugs:
$I$. The recombinant $DNA$ technology is used for the production of therapeutic drugs which are safe and effective.
$II$. It avoids unwanted immunological responses,commonly observed with similar products isolated from non-human sources.
$III$. About $30$ recombinant therapeutics have been approved for human use in the world,including India.
Which of the statements given above are correct?

The two polypeptide chains of human insulin are linked together by which of the following?

Which of the following is based upon the principle of antigen-antibody interaction?

In $1983$, Eli Lilly, an American company, prepared two $DNA$ sequences corresponding to $A$ and $B$ chains of human insulin and introduced them in plasmids of which organism to produce insulin chains?

Which type of bond connects the $A$ and $B$ chains of human insulin?