1. Cell Cycle

2. What is a cell’s nucleus? What is DNA?
Review
What is a cell?
What is a cell’s nucleus?
What is DNA?

3. Growth and division of a cell
Cell Cycle
Growth and division of a cell

4. Why do cells need to grow and divide?
DNA “Overload”
Diffusion

5. Phases of the Cell Cycle
Interphase
Mitosis

6. Interphase G1 Phase – Cells Grow S Phase – DNA replication
G2 Phase – Cell prepares for division

7. Midlesson Review 1. Why do cells need to divide?
2. What are the two stages of the cell cycle?
3. What are the three stages of Interphase?

8. Do cells divide infinitely?
Regulating cell cycle
Do cells divide infinitely?

9. Regulating Cell Cycle Regulatory proteins (cyclins)
Signals from other cells

10. Cancer Unregulated cell growth Tumors (large masses of cells)
Tumors can cause damage to the body