Which part of the cell cycle is responsible for cell division?

The mitotic phase is the critical part of the cell cycle where actual cell division occurs. This phase encompasses mitosis, where the replicated chromosomes are separated into two new nuclei, followed by cytokinesis, which physically divides the cytoplasm of the parent cell into two daughter cells.

Understanding this process is key in cell biology as it ensures that both resulting daughter cells receive an identical set of chromosomes, maintaining genetic consistency. The mitotic phase is typically broken down into several stages: prophase, metaphase, anaphase, and telophase, each contributing to the orderly distribution of genetic material.

In contrast, interphase includes the stages of the cell cycle where the cell prepares for division but does not actually divide. This phase involves cellular growth, replication of DNA, and preparation of the necessary components for mitosis. The G1 phase and S phase are components of interphase. The G1 phase is primarily about cell growth and metabolism, while the S phase is specifically focused on DNA replication. Therefore, the mitotic phase distinctly represents the part of the cycle where the division occurs, marking its importance in the life cycle of a cell.