Biology

1. Cell Growth and Division

2. The Cell Cycle
• Cell Cycle: The regular pattern of
growth, DNA duplication, and cell
division that occurs in eukaryotic cells.
Cell cycle has 4 main stages :
1.) Gap 1 (G1)
2.) Synthesis (S)
3.) Gap 2 (G2)
4.) Mitosis (M)

3. The Cell Cycle

4. Interphase
• Interphase
• Longest part of a cell's life cycle
• Called the "resting stage" because the cell isn't
dividing
• Purpose: cells grow, develop, & carry on all
their normal metabolic functions
• There are 3 parts
• 1.) Gap 1
• 2.) Synthesis
• 3.) Gap 2

5. 1. G1 (1st Growth phase)
•Cells mature & increase in size
•Normal metabolic activities
• Must pass through a checkpoint
before it can go to S phase
Interphase

6. 2.) S (Synthesis Phase)
•DNA is replicated (copied)
Interphase

7. Interphase
3.) G2 (2nd Growth Phase)
• Additional growth
•Has to pass a checkpoint
•Everything must be in order-adequate cell
size, undamaged DNA- before the cell goes
through mitosis and division.