Manipulating with nucleic acid is a trend in Biotechnology.
(a) Name any one of organism used as vector.
(b) What is DNA polymerase?

Explanation

(a ) Bacteria - E-coli, Agrobacterium tumifaciens, Retrovirus, Plasmid, Ti-plasmid, pBR 322, bacteriophage, yeast (any one organism or component used as vector)
DNA polymerase is the enzyme which catalyses the polymerisation of deoxyribonucleotides into new DNA strand or extension of primer in PCR or commonly used tool in r DNA technology.