Replication: DNA replicates in order to create more cells for the ones that die, to repair cuts, and for growth. DNA replicates by first unzipping the double helix using the enzyme called helicase. The separation of the two single strands of DNA creates the replication fork. One of the strands is in the 3’ to 5’ direction this is the leading strand. The other strand is in the 5’ to 3’ direction, this is the lagging strand. DNA polymerase helps to create the new strand of DNA. The result of the replication is two new strands of DNA that each consist of one new strand of nucleotides and one old strand of nucleotides. This is called semi-conservative.
Where: DNA replication occurs in the nucleus of the cell because DNA is not able to leave the cell of the nucleus.