Interphase, interkinesis, stage of the cell life cycle between two consecutive mitotic divisions. Heterosynthetic Interphase is usually distinguished when a cell grows, differentiates, performs its inherent functions, and autosynthetic Interphase, during which the cell is prepared for the next division. Depending on the intensity of synthesis of deoxyribonucleic acid (DNA), the autosynthetic Interphase, in turn, is divided into 3 periods: G1 – presynthetic or postmitotic, S – synthetic and G2 – pre-mitotic, or postsynthetic. In the G1-period, the accumulation of energy resources necessary for cell division, the synthesis of ribonucleic acid (RNA), and the preparation for the doubling of DNA molecules (replication) are carried out; Due to the protein synthesized during this period, the cell mass increases and a number of enzymes are formed that are necessary for DNA synthesis in the next period. Interphase In the S period, DNA is synthesized, i.e., e molecules are replicated. In the G2 period, DNA synthesis is completed, the synthesis of RNA and proteins, apparently going to the construction of the mitotic apparatus, is enhanced.
In the cells of an adult body And lasts from 10 to 30 hours or more; in rapidly dividing cells, Interphase lasts several minutes (for example, in sea urchin eggs at the stages of 2-4 blastomeres – 14 minutes).