Cell Biology/Cell division/Cell cycle
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The normal cell cycle consists of 2 major stages. The first is Interphase, during which the cell lives and grows larger. The second is Mitotic Phase. Interphase is composed of three subphases. G1 phase (first gap), S phase (synthesis), and G2 phase (second gap). The interphase is the growth of the cell. The normal cell functions of creating proteins and organelles. The Mitotic Phase is composed of Mitosis and Cytokinesis. Mitosis, when the cell divides. Mitosis can be further divided into multiple phases. Cytokinesis, which is when the two daughter cells complete their separation. There is some overlap between there two sub phases.
[edit] From Wikipedia
The cell cycle is the cycle of a biological cell, consisting of repeated mitotic cell division and interphase (the growth phase). A cell spends the overwhelming majority of its time in the interphase(about 90% of time).
[edit] Overview
Schematic of the cell cycle. I=Interphase, M=Mitosis.
The duration of mitosis in relation to the other phases has
been exaggerated in this diagram.
The cell cycle consists of
- G1 phase, the first growth phase
- S phase, during which the DNA is replicated, where S stands for the Synthesis of DNA.
- G2 phase is the second growth phase, also the preparation phase for the
- M phase or mitosis and cytokinesis, the actual division of the cell into two daughter cells
The cell cycle stops at several checkpoints and can only proceed if certain conditions are met, for example, if the cell has reached a certain diameter. Some cells, such as neurons, never divide once they become locked in a G0 phase.
[edit] Details of mitosis
Schematic of interphase (brown) and mitosis (yellow).
