Work Step by Step
Most cells spend much of their lives in interphase, the part of the cell cycle that prepares the cell for cell division. Interphase consists of three phases: G1, S, and G2. During these phases, the cell grows larger, organelles are copied, and DNA is replicated. Only a small part of the life cycle of cells is spent in cell division or mitosis, which consists of prophase, metaphase, anaphase, and telophase.