Interphase

Definition

Interphase is the phase of the cell cycle where the cell prepares for division by growing and replicating its DNA. It consists of three stages: G1, S, and G2.

5 Must Know Facts For Your Next Test

1. Interphase accounts for about 90% of the total time in the cell cycle.
2. During G1 phase, the cell grows and synthesizes proteins necessary for DNA replication.
3. S phase is marked by DNA replication, resulting in two sister chromatids for each chromosome.
4. In G2 phase, the cell continues to grow and produces proteins needed for mitosis.
5. Interphase is crucial for ensuring that cells have sufficient resources and accurate genetic material before entering mitosis.

Review Questions

• What are the three stages of interphase?
• What key events occur during the S phase of interphase?
• Why is interphase important for cell division?

Related terms

Mitosis:

The process where a single cell divides into two identical daughter cells.

Cell Cycle: The series of events that take place in a cell leading to its division and duplication.

Chromatid: One-half of two identical copies of a replicated chromosome.