DNA Replication

What is DNA replication? – Definition

DNA Replication is the complex process in which DNA unwinds and makes an identical copy of a section of double-stranded DNA, using existing parental DNA as a template for the synthesis of new daughter DNA strands.

Models of DNA replication

There are three possible models of DNA replication

  • Semi conservative
  • Conservative
  • Dispersive

Semi conservative Replication

Each of two daughter helices conserves only one of the parental strands hence the process is called as semi conservative replication.

Conservative Replication

Both strands of the new DNA molecule are newly synthesized strands; both strands of the parental DNA are conserved.

Dispersive Replication

In this model there is fragmentation of parental strand and intermixing of pieces of parent helix with newly synthesized pieces to form new daughter molecule.

The correct model is the first. Semiconservative DNA Replication was proved by the experiment of Meselson – Stahl.

DNA Replication enzymes

Genetic material replication is a primarily enzyme dependent process. Page DNA replication enzymes lists enzymes involved in the replication along with their major functions.

DNA replication process

Brief explanation of the proceedings of DNA replication is provided on the page Steps or Process of DNA replication.