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Chapter 10 Cell Growth and Division

Chapter 10 Cell Growth and Division. Section 10-1 & 10-2. Cell Growth. Cells divide rather than get larger because……. Demands on DNA would be too great. Cell would have trouble moving food and waste across the cell membrane.

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Chapter 10 Cell Growth and Division

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  1. Chapter 10 Cell Growth and Division Section 10-1 & 10-2

  2. Cell Growth Cells divide rather than get larger because……. • Demands on DNA would be too great. • Cell would have trouble moving food and waste across the cell membrane.

  3. If a cell got too large, it would be more difficult to get oxygen in and waste products out. Volume increases faster than surface area.

  4. Chromosomes Each organism has a specific number of chromosomes. During cell division chromatin condenses into chromosomes. In order for each cell to get the right number the chromosomes have to double

  5. Parts of a chromosome

  6. The Cell Cycle Cell cycle – The series of events that cells go through as they grow and divide.

  7. Interphase • G1 – Growth phase #1. Cells increase in size and make new proteins and organelles. • S – Synthesis. Chromosomes are replicated. • G2 – Growth Phase #2 Cell division organelles are produced. Short phase.

  8. Cell division Cell division is made up of 2 parts. 1. Mitosis – division of the nucleus. Divided into 4 phases. 2. Cytokinesis – division of the cytoplasm.

  9. Prophase • Chromosomes are visible. • Centrioles separate • Spindle fibers form • Nuclear membrane breaks down.

  10. Metaphase Chromosomes line up in the middle of the cell

  11. Anaphase Chromosomes are pulled apart/away from each other.

  12. Telophase The opposite of prophase occurs. Chromosomes disappear back to chromatin Nuclear membrane reforms Spindle fibers break apart and disappear

  13. Cytokinesis Cytokinesis occurs right after Mitosis and is the division of the cytoplasm.

  14. Can you tell the phase?

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