(ELONGATION)

1) RNA Primase bind to dna strand and synthesized short RNA Primer by adding RNA nucleotide to initiate the replication process. DNA Polymerase III add free dna nucleotide to 3' end of short rna primer and is in the direction of 5' end to 3' end.

2) DNA nucleotides must be complementary to the bases of the template strand. Elongation is in the direction of 5' end to 3' end. Leading strand is synthesized continuosly towards replication fork. Lagging strand synthesized discontinuosly away from replication fork forming OKAZAKI FRAGMENT.