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

The Indian Parliament recently cleared which amendment of the Indian Patent Bill?

At present,about $X$ recombinant therapeutics have been approved for human use the world over. Out of these,$Y$ are being marketed in India.

Find the correct statements from the following:
$I.$ Gene therapy is a genetic engineering technique used to treat diseases at the molecular level.
$II.$ Calcitonin is a medically useful recombinant product in the treatment of infertility.
$III.$ Bt toxin is a biodegradable insecticide obtained from $Bacillus \text{ } thuringiensis$.

In mature insulin,chain $A$ and chain $B$ are interlinked by which bond?

Gene therapy is: