DNA replication is the process which facilitates the cell to form an exact copy of the genetic material called DNA. This process takes place during the Synthesis phase of the cell cycle.
DNA replication is a complex process which is mediated by the enzymes- DNA helicase, DNA primase, DNA polymerase and DNA ligase. The formation of the new DNA strand is an energy-dependent process that is it requires the ATP to bind new nucleotide to the strand.