Which part of the cell cycle is known for DNA replication?

During the cell cycle, the S phase, which stands for "synthesis," is specifically designated for DNA replication. This phase follows the G1 phase, where the cell grows and prepares for replication, and precedes the G2 phase, where the cell prepares for mitosis.

In the S phase, each chromosome is duplicated, resulting in two sister chromatids for each chromosome, ensuring that when the cell eventually divides, each daughter cell will receive an identical set of chromosomes. This process is crucial for genetic continuity and the proper distribution of genetic material during cell division.

The other phases of the cell cycle have distinct roles that do not involve DNA replication. The G1 phase is primarily focused on cell growth and metabolism, while the G2 phase is involved in further preparation for mitosis, including the production of proteins necessary for cell division. The mitotic phase encompasses the actual division of the cell and its nucleus, which follows the completion of DNA replication in the S phase.