What function does the G2 phase of the cell cycle serve?

The G2 phase of the cell cycle primarily serves the function of preparation for mitosis. During this phase, the cell undergoes a series of checks and balances to ensure that it is fully prepared to divide. This includes checking for DNA damage or replication errors that may have occurred during the S phase, where DNA synthesis happens. The G2 phase allows the cell to repair any issues detected in the DNA and to synthesize proteins necessary for the mitotic process. Once these checks and preparations are complete, the cell can safely enter mitosis to ensure accurate distribution of DNA to the daughter cells. Thus, the emphasis on preparation for mitosis highlights the critical role G2 plays in cell division and the maintenance of genetic integrity.