Cancer occurs when the cell cycle is not regulated

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Cancer occurs when the cell cycle is not regulated. Mitotic Phase A key part of the cell division is to create copies of the genetic materials. The mitotic phase includes… Mitosis Cytokinesis Mitosis is a multi step process in which the nucleus of the cell divides. Cytokinesis which comes after mitosis, is the division of the cytoplasm to create two daughter cells . M (Mitotic Phase) G 0 I (Interphas e) M G2 S G 1
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Cell divides at different rates: The rate at which the cell divides is linked to your body’s need for those cells. In humans the S, G2 and M stage in humans together takes about 12 hours. The rate of cell division is greater in embryos and children (because the cell cycle is shorter and are still developing) than in adults. The rate of cell division varies within different tissues of the adult body. The internal lining of the digestive system gets a lot of wear and tear, so its replaced every few days. Cell Size: To maintain a suitable size, growth and division must be coordinated. If a cell is more than doubled its size before dividing, the daughter cells would be larger than the original cell. If this occurred in each generation then cells would become quickly too large to live. And if the cell did not double the size before dividing , the daughter cells would be smaller than the original cell, and this happened in each generation then the cell would quickly become to small to live. The smaller the cell size the ratio of SA to V is greater. Therefore, as the cell size decreases the SA to V increases. We can conclude by saying that the smaller the cell the more efficient the surface area to volume ratio. Vocabulary: Chromatin: Uncoiled strand of DNA wrapped around proteins called histones; the form DNA takes when the cell is not dividing. Histones : Histones are the main proteins in chromatin. Chromatids: The chromatids are made of a substance called the chromatin. The 2 copies of each chromatid are joined together by a centromere to form a chromosome.
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