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KEY CONCEPT A cell’s life consists of a repeating pattern of events called the cell cycle.

KEY CONCEPT A cell’s life consists of a repeating pattern of events called the cell cycle. Cell Cycle Events include:. Growth Carrying out is job DNA and organelle duplication Division. The Cell Cycle is divided into two main stages: Interphase and Cell Division.

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KEY CONCEPT A cell’s life consists of a repeating pattern of events called the cell cycle.

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  1. KEY CONCEPT A cell’s life consists of a repeating pattern of events called the cell cycle.

  2. Cell Cycle Events include: • Growth • Carrying out is job • DNA and organelle duplication • Division

  3. The Cell Cycle is divided into two main stages: Interphase and Cell Division .

  4. INTERPHASE Purpose: Grow, Carry out Job, Prepare for Cell Division G1 - Cell growth, Do job Duplicate organelles S - DNA synthesis (copies DNA) G2 - Additional growth, Duplicate organelles Normal functions

  5. 2 Parts of Cell Division “M” Stage: 1. Mitosis 2. Cytokinesis

  6. MITOSIS “Nuclear Divison” Purpose: Divides nucleus into 2 genetically identical nuclei 4 Stages of Mitosis: • Prophase • Metaphase • Anaphase • Telophase

  7. CYTOKINESIS PURPOSE: Divide the cytoplasm to form two separate cells Animal Cell Plant Cell

  8. The Final Product of the Cell Cycle…… • 2 Daughter Cells that are genetically identical to the parent cell – same # of chromosomes with same DNA information Start of Interphase End of Interphase/ End of Mitosis Beginning of Mitosis End of Cytokinesis

  9. Reasons Cells Divide • Growth • Replacement • Repair • Maintain size limit (surface area to volume ratio)

  10. Cell size is limited. • Volume increases faster than surface area.

  11. Cells divide at different rates. • The rate of cell division varies with the need for those types of cells. • Some cells are unlikely to divide (G0) Ex. Neurons (nerves).

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