Accurate maintenance and transfer of genetic information is crucial to the maintenance of genomic stability. Proper replication of DNA is important for progenitor cells to have the same genetic information. Enzymes that facilitate proper replication, as well as repair of DNA are called DNA polymerases. These biological catalysts synthesize new DNA strands by adding nucleotides to the pre-existing primer in a sequence complementary to the template strand with high fidelity . Polymerases are usually classified based on their structural features as well as function into seven different families: A, B, C, D, X, Y and RT.