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Beginning of Paper
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Mitosis in cancerous cells
Mitosis, the process in which a cell undergoes nuclear division, is one of the four subdivisions of the cell cycle responsible for cell growth and reproduction. The first step in mitosis is prophase. In prophase the chromatin, diffuse in interphase, condenses into chromosomes. Each chromosome du ....
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Middle of Paper
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.... to grow until nutrients in the growth medium are exhausted. Other differences exist between normal and cancer cells. These indicate abnormalities in the cell cycle of cancer cells. Cancer cells that stop dividing do so at random points in the cycle, instead of the restriction point in G1 also known as Gap 1 in the cell cycle.
Cancer cells in culture continue to divide indefinitely as long as nutrients are available. Normal cells in culture divide only about 20 to 50 times before they stop. It is clear that genetic changes are responsible for these abnorm ....
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