The vector used for delivery of $ADA$ $cDNA$ into cells of a patient receiving gene therapy is

Repeated transfusions of genetically modified cells are required in $SCID$ patients and in enzyme replacement therapy because

With regard to insulin,choose the correct options.
$(a)$ $C$-peptide is not present in mature insulin.
$(b)$ The insulin produced by $rDNA$ technology has $C$-peptide.
$(c)$ The pro-insulin has $C$-peptide.
$(d)$ $A$-peptide and $B$-peptide of insulin are interconnected by disulphide bridges.
Choose the correct answer from the options given below.

Magic bullets are the

Injecting functional adenosine deaminase into a patient's (lacking $ADA$ gene) blood cells may be considered as

In some children,$ADA$ deficiency can be cured by