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G1 phase (or post-mitotic phase) is one of the four phases of the [ | G1 phase (or post-mitotic phase) is one of the four phases of the [[Cell cycle|cell cycle]] and occurs in stage one of [[Interphase|interphase]]. G stands for Gap and the 1 represents first so the G1 phase is the first gap phase. During this phase, the cell increases in mass carrying out [[protein synthesis|protein synthesis]] and other cellular functions, ecxcept [[DNA replication|DNA replication]]. This phase includes the G1 checkpoint which is an important control point in the cell cycle. During this checkpoint the cell normally becomes committed to [[DNA synthesis|DNA synthesis]]. However, it can enter a quiescent resting state, [[G0|G0]], a paused stage where they can then enter G1. The [[Chromosomes|chromosomes]] each contain only one [[Molecule|molecule]] of [[DNA|DNA]] and are not visible <ref>Interphase website http://biology.uoregon.edu/reference/ort_mitosis/interphase.html</ref>. <br> | ||
<br> | It is contolled by activity of [[cyclin-dependent kinase|cyclin-dependent kinases]] <ref>Bruce Alberts, 2008, Molecular biology of the cell, 5th edition, New York, Garland Science</ref>.<br> | ||
References: < | === References: === | ||
<references /> | |||
Latest revision as of 09:58, 1 December 2012
G1 phase (or post-mitotic phase) is one of the four phases of the cell cycle and occurs in stage one of interphase. G stands for Gap and the 1 represents first so the G1 phase is the first gap phase. During this phase, the cell increases in mass carrying out protein synthesis and other cellular functions, ecxcept DNA replication. This phase includes the G1 checkpoint which is an important control point in the cell cycle. During this checkpoint the cell normally becomes committed to DNA synthesis. However, it can enter a quiescent resting state, G0, a paused stage where they can then enter G1. The chromosomes each contain only one molecule of DNA and are not visible [1].
It is contolled by activity of cyclin-dependent kinases [2].
References:
- ↑ Interphase website http://biology.uoregon.edu/reference/ort_mitosis/interphase.html
- ↑ Bruce Alberts, 2008, Molecular biology of the cell, 5th edition, New York, Garland Science