While cloning vectors, which of the two will be preferred by biotechnologists - bacteriophages or plasmids. Justify with reason.

Question

(a) While cloning vectors, which of the two will be preferred by biotechnologists - bacteriophages 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.

Answer 1

(a) Bacteriophages, because they have very high copy numbers of their genome within the bacterial cells whereas some plasmids may have only one or two copies per cell and others may have 15-100 copies per cell.

(b) Rosie, it produced human protein-enriched milk (2.4 Gms per litre).