The cell cycle has four main stages.

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Presentation transcript:

KEY CONCEPT Cells have distinct phases of growth, reproduction, and normal functions.

The cell cycle has four main stages. Cell Cycle: is a regular pattern of growth, DNA replication, and cell division.

The main stages of the cell cycle are gap 1, synthesis, gap 2, and mitosis. IPMAT 1. Gap 1 (G1): 2. cell growth and normal functions 3. DNA synthesis (S): 4. copies DNA 5. Gap 2 (G2): 6. additional growth 7. Mitosis (M): includes 15. Interphase 8. cell division of the nucleus (mitosis) and division of the cell cytoplasm (cytokinesis) Mitosis occurs only if the cell is large enough and the DNA undamaged.

Cell Cycle Continued…. 14. Mitosis 9. Prophase 10. Metaphase 11. Anaphase 12. Telophase 13. Cytokinesis

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).

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

Surface area must allow for adequate exchange of materials. Cell growth is coordinated with division. Cells that must be large have unique shapes.