During interphase, which is the nondividing phase in a cell cycle, the growth and metabolic activities of a cell primarily occur, according to The Collin County Community College District. Interphase makes up around 90 percent of the cell cycle, and it is a period of intense biochemical activity wherein the cell grows and copies its chromosomes to prepare for cell division.
The Collin County Community College District details that interphase comprises three periods: the G1 phase is the first growth phase; the S phase is the synthesis phase, in which DNA is synthesized while chromosomes are duplicated; and the G2 phase is the second growth phase. The characteristics of a G2 cell include a well-defined nucleus bounded by a nuclear envelope, two centrosomes next to the nucleus, one or more nucleoli, duplicated chromosomes, and a pair of centrioles in every centrosome and a radial mictorubular array around the centrioles, in animals.
The University of Pittsburgh at Titusville states that interphase and the four phases of mitosis, which include prophase, metaphase, anaphase and telophase, make up the cell cycle. Interphase precedes cell division, and it occurs before the initiation of mitosis or meiosis. Aside from duplicating its chromosomes, the cell also manufactures the necessary materials for cell division. After the completion of the G2 phase, the cell then undergoes mitosis or meiosis.