Question

when a cell enters the cell cycle, what phase does it enter first?

Answer 1

When a cell enters the cell cycle, it first enters the **G1 phase (Gap 1 phase)**. During G1, the cell grows, synthesizes proteins, and prepares for DNA replication. After G1, the cell progresses to the S phase (Synthesis phase), where DNA replication occurs, followed by the G2 phase (Gap 2 phase) before it enters mitosis (M phase).