Lecture 10: CELL DIVISION Summary. Every organism is composed of cells. All cells arise from preexisting cells. New cells are formed by cell division which produces two genetically identical cells. In eukaryotes the process is called mitosis. Mitosis alternates with interphase, making a complete cell cycle. The entire cycle is carefully regulated by a molecular control system. In pathology, tumor cells arise from other tumor cells. In some cancers, cell division is unchecked owing to failure of normal control signals. “Omnis cellula e cellula” (where a cell arises, there a cell must previously have existed) Rudolf Virchow, (1858) Die Cellularpathologie in ihrer Begründung auf physiologische und pathologische Gewebelehre, Berlin, A. Hirschwald. Reading Assignment Campbell, N. A. and Reece, J. B. (2008). Biology. Chapter 12 (228-245). Objectives 1. To be able to describe the events in bacterial cell division. 2.
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