During the cell cycle, DNA replication occurs during the S-phase portion of the interphase. Interphase occurs between cell divisions and is a necessary precursor step for cell division.Know More
Interphase is divided into three successive stages: the G1 phase, S phase and G2 phase. The flanking G phases involve cell growth and preparation for division of the cell to occur; the "G" in G phase stands for growth. In between these growth periods, the cell undergoes the synthesis, or S, phase. During the S phase, the chromosomes within the cell are copied so that the divided cells have matching copies of DNA. The cell then undergoes the more visibly active stages of cell division: prophase, anaphase, telophase and cytokinesis.
Typical human cells take around 24 hours to complete a full cycle of cell replication and division. The longest portion of this process is interphase, which takes around 23 hours. The replication of chromosomes during the S phase takes about 8 hours. Other types of cells complete cell division more rapidly; for example, during early embryonic development, the complete cell cycle can occur in about 30 minutes. In these rapid cell divisions, the growth phases are often skipped or drastically reduced and replication takes place more quickly. Even when the G1 and G2 phases don't occur, the cell must complete the S phase of interphase in order to replicate its DNA before division.Learn more about Molecular Biology & DNA
DNA replication occurs in the nucleus of eukaryotic cells and in the cytoplasm of prokaryotic cells. In both cells, the process involves a variety of steps and enzymes.Full Answer >
DNA replication occurs within the nucleus of a cell. During the cell cycle S phase, any time that a cell needs to divide, DNA replication occurs. Prior to cell division, the DNA replication process ensures the copying of chromosomes.Full Answer >
The stages of the cell cycle in order are interphase, prophase, metaphase, anaphase and telophase. This process is known as mitosis and is used to generate new cells.Full Answer >
The longest part of the cell cycle is interphase. During interphase, the cell undergoes a growth phase in which it acquires energy to copy DNA. Once the DNA is copied, the cell undergoes another growth stage and acquires energy to complete cell division.Full Answer >