The correct sequence of the cell cycle is-
- In the G1 (gap 1) phase, the cell prepares for DNA synthesis.
- DNA synthesis occurs during the S (synthesis) phase of the cell cycle. During the S phase, DNA is completely replicated, but only once.
- Cell prepares for mitosis in the G2 (gap 2) phase when proteins necessary for daughter cells are synthesized. Then the cell enters into the M (mitotic) phase when chromosomes are visible under the microscope. The whole cycle lasts about 24 hours; out of which M phase is only 1-2 hours.
- Those cells which are not in the division are said to be in the G0 phase or resting phase.