1. The Cell Cycle Ms. Napolitano & Mrs. Haas CP Biology

2. The Cell Cycle The cell cycle – series of events that cells go through as they grow and divide Made of two parts: 1.Interphase 1.G 1 phase 2.S phase 3.G 2 phase 2.M phase 1.Mitosis 2.Cytokinesis

3. Interphase Interphase – the period between divisions Cell growth Majority of the cell cycle Preparation for division Contains the G 1, S, & G 2 phases

4. G 1 Phase G = “Gap” Majority of cell growth Increase in cell size Make new proteins & organelles

5. S Phase S = “Synthesis” DNA replicated Synthesis of DNA molecules *NOTE: Chromosomes not actually present yet!

6. G 2 Phase Shortest of interphase Organelles produced for cell division Transitions from here to mitosis

7. M Phase … to be continued!

8. Interphase Video: http://highered.mcgraw- hill.com/sites/0072495855/student_view0/ch apter2/animation__how_the_cell_cycle_work s.html

9. What does G 1 & G 2 stand for? 1.Gap 2.Growth 3.Either gap or growth 4.Neither gap nor growth Countdown 5

10. What does M stand for (M phase)? 1.Mirror 2.Mitosis 3.Mitochondria 4.Mother May I Countdown 5

11. What does S stand for (S phase)? 1.Strand 2.Synonym 3.Structure 4.Synthesis Countdown 5

12. What phase is the longest? 1.G 1 2.S 3.G 2 4.M Countdown 5

13. What phase contains cytokinesis? 1.G 1 2.S 3.G 2 4.M Countdown 5

14. What phase copies DNA? 1.G 1 2.S 3.G 2 4.M Countdown 5

15. Cancer disrupts what phase? 1.G 1 2.S 3.G 2 4.M Countdown 5

16. Centrioles divide at what phase? 1.G 1 2.S 3.G 2 4.M Countdown 5

17. During what phase do cells divide? 1.G 1 2.S 3.G 2 4.M Countdown 5

18. When cells no longer divide, they are said to enter what phase? 1.G 0 2.G 1 3.G 2 4.G 3 Countdown 5