G1 phase

G1 phase is the first of four phases of the cell cycle that takes place in eukaryotic cell division. In the G1 phase, cells increase in size in preparation for DNA replication, and also synthesize proteins and produce RNA. The G1 phase is followed by the S phase, where DNA is replicated.

Overview

The G1 phase or Gap 1 phase is one of the four phases of the cell cycle that takes place in eukaryotic cell division. In the G1 phase, cells increase in size in preparation for DNA replication, and also synthesize proteins and produce RNA. The G1 phase is followed by the S phase, where DNA is replicated.

Function

The primary function of the G1 phase is to prepare the cell for DNA replication and division. During this phase, the cell grows in size and synthesizes proteins and RNA. This is also the phase where the cell checks the DNA for any damage before it is replicated in the S phase.

Regulation

The G1 phase is regulated by the G1/S checkpoint. This checkpoint ensures that the cell is ready for DNA replication and division. If the cell is not ready, it will not proceed to the S phase.

See also

• Cell cycle
• S phase
• G1/S checkpoint
• DNA replication
• Protein synthesis

References

G1 phase Resources
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