Thursday, April 16, 2015

During which part of the cell cycle does a cell spend the majority of its time?

There are three main phases of the life cycle of a cell: interphase, mitosis and cytokinesis. Mitosis is further divided into 4 phases: prophase, metaphase, anaphase and telophase. Among all these phases, the cell spends most of its life in interphase. It has been estimated that a cell may spend more than 3/4th of its life in interphase. During this phase, the cells make preparations for division, including chromosome replication, cell enlargement, and protein synthesis. Interphase consists of three sub-phases, including the G1 phase, S phase and G2 phase. After interphase, cells enter mitosis, where the cell makes all the preparations for division. The cell division actually takes place in the cytokinesis phase and each cell gives rise to two daughter cells. Among all the phases of mitosis, the cell spends most of its time in prophase, while anaphase is the shortest of all the phases.


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