during which phase is DNA duplicated?

is it the "S" phase???

DNA is duplicated during the S phase (synthesis phase) of the cell cycle. To understand this, let's break it down:

1. Cell Cycle: The cell cycle is a series of events that a cell undergoes, including growth, replication of DNA, and division into two daughter cells.

2. Phases of the Cell Cycle: The cell cycle consists of three main phases: interphase, mitosis, and cytokinesis. Interphase is further divided into three phases: G1 phase (gap 1 phase), S phase (synthesis phase), and G2 phase (gap 2 phase).

3. DNA Replication: During the S phase, DNA replication occurs. This means that the DNA molecules within the cell nucleus make an identical copy of themselves. Each DNA double helix unwinds, and new complimentary nucleotides are added to each separated strand. This process results in two identical copies of the original DNA molecule.

4. Importance of DNA Duplication: DNA replication is essential for cell growth and division. Each newly formed daughter cell must receive a complete set of DNA to ensure the genetic information is preserved.

In summary, DNA is duplicated during the S phase of the cell cycle, where each DNA molecule within the cell nucleus is replicated, resulting in two identical copies of the original DNA molecule.