1. Cell Cycle Review

2. A cell’s life is broken down into 2 major periods. What are they?

3. A cell’s life is broken down into 2 major periods. What are they?
Interphase
M Phase

4. Name the phase of mitosis during which the nuclear membrane begins to reform.

5. Name the phase of mitosis during which the nuclear membrane begins to reform.
Telophase

6. What stage of the cell cycle is this cell in
What stage of the cell cycle is this cell in? (green = spindle fibers blue = genetic material)

7. What stage of the cell cycle is this cell in
What stage of the cell cycle is this cell in? (green = spindle fibers blue = genetic material)
cytokinesis

8. What happens to chromatin upon entering prophase?

9. What happens to chromatin upon entering prophase?
It begins to condense into chromosomes

10. What are spindle fibers, and what do they do?

11. What are spindle fibers, and what do they do?
Microtubules extending from the centriole to help in cell division,
In particular attaching to the centromere and separating sister chromatids.

12. What stage of the cell cycle is this cell in
What stage of the cell cycle is this cell in? (green = spindle fibers blue = genetic material)

13. What stage of the cell cycle is this cell in
What stage of the cell cycle is this cell in? (green = spindle fibers blue = genetic material)
anaphase

14. Write out the entire sequence of the cell cycle, beginning with G1 phase.

15. Write out the entire sequence of the cell cycle, beginning with G1 phase.
In interphase: G1 phase, S phase, G2 phase
In M phase: prophase, metaphase, anaphase, telophase, cytokinesis

16. When an animal cell divides, what structure is responsible for pinching the cytoplasm into 2 separate cells?

17. When an animal cell divides, what structure is responsible for pinching the cytoplasm into 2 separate cells?
Contractile ring

18. When an animal cell divides, what ridge forms as the contractile ring begins to pinch the cytoplasm into 2 daughter cells?

19. When an animal cell divides, what ridge forms as the contractile ring begins to pinch the cytoplasm into 2 daughter cells?
Cleavage furrow

20. I am building a biological robot
I am building a biological robot. Currently, I am in the process of engineering all of the robot cells. How big should I make them? Why?

21. I am building a biological robot
I am building a biological robot. Currently, I am in the process of engineering all of the robot cells. How big should I make them? Why?
They should be very small.
Less energy needed to maintain small cell.
Greater surface area to volume ratio in a small cell. In other words,
as the size of a cell increases, the volume increases much faster than
the surface area.

22. Describe what happens during prophase.

23. Describe what happens during prophase.
Chromatin condenses into chromosomes.
Centrioles separate on opposite sides of nucleus.
Spindle forms and attaches to centromeres.
Nuclear membrane breaks down.

24. What stage is this cell in? green = spindle red = genetic material

25. What stage is this cell in? green = spindle red = genetic material
Metaphase

26. During which phase are sister chromatids pulled apart?

27. During which phase are sister chromatids pulled apart?
Anaphase

28. During the cell cycle, the period of DNA synthesis is surrounded by 2 periods of __________.

29. During the cell cycle, the period of DNA synthesis is surrounded by 2 periods of __________.
Growth (G1 phase and G2 phase)

30. Bonus Question: What would develop if cell division was not regulated, and continued out of control?

31. Bonus Question: What would develop if cell division was not regulated, and continued out of control?
A tumor!