sentences:  This property is vital to proper proofreading and repair of errors that occur during DNA replication.The replication fork is the junction between the newly separated template strands, known as the leading and lagging strands, and the double stranded DNA.Since duplex DNA is antiparallel, DNA replication occurs in opposite directions
  between the two new strands at the replication fork, but all DNA polymerases synthesize DNA in the 5' to 3' direction with respect to the newly synthesized strand.