Which of these is an accurate description of gene therapy?

1.	A form of site directed mutagenesis.
2.	Introduction of cloned genes into living cells to cure disease.
3.	Cloning of a disease gene in order to understand the disease.
4.	All of these.

At present transgenic animals cannot be used for:

The first drug produced using recombinant DNA technology is used to treat:

The two polypeptide chains of insulin protein are linked together by:

The viruses generally used for gene therapy are:

Bacillus thuringiensis (Bt) strains have been used to design novel:

A probe which is a molecule used to locate homologous sequences in a mixture of DNA or RNA molecules could be:

A protoxin is:

The trigger for activation of toxin of Bacillus thuringiensis is: