Interphase

Interphase is a phase of the cell cycle, during which the cell prepares for mitosis or meiosis. Interphase is divided into three separate phases: G1 phase, S phase, and G2 phase.

Overview

Interphase is the longest phase of the cell cycle. This is the phase where the cell grows in size and replicates its DNA in preparation for division. The cell also increases its supply of proteins, increases its number of organelles, and grows in size.

Phases of Interphase

G1 Phase

The G1 phase, or Gap 1 phase, is the first of three phases in the interphase of the cell cycle. During this phase, the cell grows in size and synthesizes mRNA and proteins in preparation for subsequent steps leading to mitosis.

S Phase

The S phase, or synthesis phase, is the second phase of interphase. During this phase, the cell replicates its DNA. At the end of this phase, each chromosome has two chromatids.

G2 Phase

The G2 phase, or Gap 2 phase, is the third and final phase of interphase. During this phase, the cell continues to grow and produce proteins. At the end of this phase, the cell is ready to enter mitosis and divide.

Role in the Cell Cycle

Interphase plays a critical role in the cell cycle by preparing the cell for division. The cell grows in size, replicates its DNA, and synthesizes necessary proteins during this phase. Without interphase, the cell would not be ready to divide and would not have the necessary components to form two new cells.

See Also

• Cell cycle
• Mitosis
• Meiosis
• DNA replication

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  Interphase and part of Telophase of HT1080