When a gene is targeted to correct a disease by amplifying the gene,what is this process called?

Which of the following statements are false?
$I$. Insulin for curing diabetes,used to be extracted from the pancreas of slaughtered pig and cattle.
$II$. Animal insulin is slightly different from human insulin.
$III$. Animal insulin causes some undesirable side effects such as allergy.
$IV$. Bacteria cannot be made to synthesise insulin from its gene because of the presence of introns.
Choose the correct option.

An example of gene therapy is .......

In which bacteria was the insulin gene cloned?

Which of the following is produced using $E. coli$?

Which of the following methods,other than gene therapy,has been used for the treatment of $ADA$ deficiency?