What occurs during the G1 phase of the cell cycle?

During the G1 phase of the cell cycle, the primary focus is on cell growth and the performance of normal metabolic functions. This phase is crucial because it allows the cell to increase in size, synthesize proteins, and produce the necessary organelles required for its functions. The G1 phase prepares the cell for the subsequent stages of the cell cycle by ensuring it has adequate resources and energy to support DNA replication and eventual cell division.

As the cell progresses through the G1 phase, it also evaluates its environment and can respond to signals that indicate whether it should continue to progress through the cycle, enter a resting state (G0), or initiate division. Therefore, this phase is essential for cellular health, growth, and readiness for the next phase of the cycle, where DNA duplication occurs in the S phase.