Answer:
During the cell cycle, the G phase, or Gap phase, is a period of growth and preparation for DNA replication. This phase is divided into two parts: G1 and G2.During G1, the cell grows in size, produces RNA and proteins necessary for DNA replication, and checks for any damage to its DNA. The cell also determines whether it is ready to enter the S phase (DNA synthesis phase) by checking if there are enough nutrients and energy available.If the cell passes the checkpoint at the end of G1, it enters S phase where DNA replication occurs. After DNA replication is complete, the cell enters G2 phase. During this phase, the cell continues to grow and produce proteins necessary for mitosis (cell division). The cell also checks if DNA replication was successful and if there are any errors that need to be corrected before proceeding with mitosis.
Overall, the G phase is a crucial part of the cell cycle as it ensures that the cell is fully prepared for DNA replication and mitosis.