a) While cloning vectors, which of the two will be preferred by biotechnologists bacteriophases or plasmids, Justify with reason.
b) Name the first transgenic cow developed and state the improvement in the quality of the product produced by it.

Explanation

(a) Biotechnologist will prefer bacteriophage as the preferred cloning vector.
Reason : Bacteriophage have very high copy numbers of their genome within the bacterial cell whereas, plasmids have variable copy number per cell, some may have only one or two copies per cell and others may have 15-100 copies per cell.
(b) Rosie is the first transgenic cow developed which produces human protein entriched milk (human `alpha`-albumin 2.4 g/L).