Three stages of Interphase

Three stages of Interphase

1. Three Stages of Interphase

2. Introduction The stages in a cell that is progressing towards cell division is called the cell cycle. The cell cycle is broadly divided into two phases: the interphase and the mitotic phase.  Interphase is the phase during which the growth of the cells take place along with the metabolic activity but the nuclear division in the cell does not occur. The three stages included within the interphase are the G1, S and G2.

3. G1 Phase (the first Gap Phase):the first Stage of Interphase During the G1 phase or the Gap 1 phase, the protein synthesis and the RNA synthesis within the cell resumes that was interrupted during the process of mitosis. Growth and young cell maturation occurs, which accomplish the physiological function. G1 phase is the phase during which the cell cycle starts with the synthesis of RNA and proteins required by the young cells for their growth and maturity. The time period of the G1 phase of the interphase is varied highly among the different species’ eukaryotic cells. For example, faster renovation tissues like the mucosa and the endometrial epithelium require very short G1 periods as compared to the muscles or connective tissues that do not require frequent repair or renovation. G1 phase is usually termed as the prior to DNA synthesis phase.

4. S Phase: the Second Stage of Interphase The DNA synthesis place as the name suggests, S which stands for synthesis. Soon after the G1 phase, DNA checking and subsequent repair occurs during the variable pause phase before the transition of the cell cycle to the S phase. The S phase of the interphase deals with the semi-conservative synthesis of DNA occurs. Replication of cellular DNA begins with the S phase, which when gets duplicated with the cell containing nearly double the amount of chromosomes, the cells from the S phase move into the G2 phase.

5. G2 Phase (the Second Gap Phase): the third Stage of Interphase During the G2 phase, there is an increase in the synthesis of the RNA and the protein, which is followed by another round of proof reading and subsequent repair among the newly synthesized DNA sequences before the cell cycle transits to the mitotic cycle. The mitotic spindle formed from the cytokinetic fibers start forming and the cell ensures the number of chromosomes and the organelles present, which further leads the cell cycle from the interphase to the mitotic phase.