# What three phases make up interphase?

May 12, 2018

The three phases that make up interphase are ${G}_{1}$, $S$, and ${G}_{2}$. $G$ stands for gap, and $S$ stands for synthesis.

#### Explanation:

During interphase, the cell grows and performs synthesis. It is composed of three phases.

1. ${G}_{1}$
This phase is defined as the gap after cell division, but before the $S$ phase. Cells prepare for growth and additional division by producing the RNA, enzymes, and other proteins.

2. $S$
During this phase, the cell's DNA is replicated. DNA undergoes semi-conservative replication, which means that each double-stranded molecule contains one original strand and one new strand.

3. ${G}_{2}$
This phase is generally considered to be the gap between the $S$ phase and mitosis or cell division. The cell continues to grow and new DNA is checked for errors. The cell makes final preparations for cell division, such as the production of the protein tubulin that is needed to make microtubules for the mitotic spindle.