BISC 101 Lecture Notes - Kinetochore, Spindle Apparatus, Telophase
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28 Jan 2013
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All living organisms comprised of cells (approximately 2 x 10^14 cells in the human body = over. Organisms may be single celled (such as amoeba or bacterium) or organisms may be multicellular. Features: structure (a liver cell will have a different structure from a nerve cell, function (cells carry out different functions, reproduction (cell division, cell cycle (regulation of division and function). The purpose of cell division is for: the reproduction of new cells, growth and development of organisms, repair of damage of tissues. Take note that cell division must give rise to genetically identical daughter cells through division of the nucleus in the process of mitosis. Similarly, the process of cytokinesis is the division of the cytoplasm. The simplest form of cell division is found in bacteria, where binary fission takes place. The cell cycle occurs in multicellular organisms. Mitosis is merely a small portion of this. There are four important phases in the cell cycle.
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