State Phase Abbreviation Description Resting Gap 0 A phase where the cell has left the cycle and has stopped dividing. Interphase Gap 1 Cells increase in size in Gap 1. The G checkpoint control mechanism ensures that everything is ready for DNA synthesis. Synthesis DNA replication occurs during this phase. Gap 2 During the gap between DNA synthesis and mitosis, the cell will continue to grow. The G checkpoint control mechanism ensures that everything is ready to enter the M (mitosis) phase and divide. Cell division Mitosis Cell growth stops at this stage and cellular energy is focused on the orderly division into two daughter cells. A checkpoint in the middle of mitosis (Metaphase Checkpoint) ensures that the cell is ready to complete cell division.
when does the mass of dna increase in the cell cycle
Interphase