Mitosis, or cell division, is a two step process. First the DNA doubles, then the cell divides
New molecular mechanism discovered that prevents cell division and cancer - cancer science news

When cells divide, their DNA is copied first in its entirety, before the cells actually splits in two. This is to ensure that both daughter cells receive a correct set of DNA that is identical from cell to cell in the body. Researchers have now identified that two enzymes become active only after completion of DNA synthesis and drive the cells into division. They are inactive during DNA replication. Thus, the control of cell division is partially controlled by DNA replication, which is an important finding with respect to the quest of pharmacological compounds for cancer arrest.

Read the full story: Karolinska Institutet
Scientific publication: Molecular Cell