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Cell Cycle - Chromosomes the cell cycle and cell division...

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1 Chromosomes, the cell cycle and cell division Requirements for cell division Four events must occur for cell division: Reproductive Signal: to initiate cell division Replication: of DNA Segregation: distribution of the DNA into the two new cells Cytokinesis: separation of the two new cells
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2 Prokaryotic Cell Division Most prokaryotes have one chromosome, a single molecule of DNA; usually circular . Based on environment Two important regions: ori —where replication starts ter —where replication ends Eukaryotic Division Cell division, not environment dependent Mitosis is the process of cell division Nucleus must be divided before cytokinesis Cytokinesis is different in plant and animal cells
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3 The Cell Cycle Cyclin Dependent Kinase Transition from G1 to S, and G2 to M are dependent on protein activation by allosteric regulation
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4 DNA packaging Importance of histones Centrosomes and
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