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9.3 Cell Cycle Regulation Cellular Reproduction Normal Cell Cycle  Different cyclin/CDK combinations signal cell activities, including DNA replication,

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Presentation on theme: "9.3 Cell Cycle Regulation Cellular Reproduction Normal Cell Cycle  Different cyclin/CDK combinations signal cell activities, including DNA replication,"— Presentation transcript:

1 9.3 Cell Cycle Regulation Cellular Reproduction Normal Cell Cycle  Different cyclin/CDK combinations signal cell activities, including DNA replication, protein synthesis, and nuclear division throughout the cell cycle. Chapter 9

2 Cellular Reproduction Quality Control Checkpoints  The cell cycle has built-in checkpoints that monitor the cycle and can stop it if something goes wrong.  Spindle checkpoints also have been identified in mitosis. Chapter 9 9.3 Cell Cycle Regulation

3 Cellular Reproduction Abnormal Cell Cycle: Cancer  Cancer is the uncontrolled growth and division of cells.  Cancer cells can kill an organism by crowding out normal cells, resulting in the loss of tissue function. Chapter 9 9.3 Cell Cycle Regulation

4 Cellular Reproduction Causes of Cancer  The changes that occur in the regulation of cell growth and division of cancer cells are due to mutations.  Various environmental factors can affect the occurrence of cancer cells. Chapter 9 9.3 Cell Cycle Regulation

5 Cellular Reproduction Apoptosis  Programmed cell death  Cells going through apoptosis actually shrink and shrivel in a controlled process. Chapter 9 9.3 Cell Cycle Regulation

6 Cellular Reproduction Stem Cells  Unspecialized cells that can develop into specialized cells when under the right conditions Chapter 9 9.3 Cell Cycle Regulation

7 Cellular Reproduction Embryonic Stem Cells  After fertilization, the resulting mass of cells divides repeatedly until there are about 100–150 cells. These cells have not become specialized. Chapter 9 9.3 Cell Cycle Regulation

8 Cellular Reproduction Adult Stem Cells  Found in various tissues in the body and might be used to maintain and repair the same kind of tissue  Less controversial because the adult stem cells can be obtained with the consent of their donor Chapter 9 9.3 Cell Cycle Regulation

9 https://www.youtube.com/watch?v=0gF8 bCE4wqAhttps://www.youtube.com/watch?v=0gF8 bCE4wqA HeLa Cells


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