AP Biology: CHAPTER 12
CELL CYCLE
1. What is meant by the concept that cells go through a cell cycle?
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2. What are the key roles of cell division?
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3. What is the significance of chromosome replication?
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4. Sketch and label replicated chromosomes.
5. List the phases of the cell cycle with a brief description of what occurs in each phase.
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6. Label the stages and key features of each stage.
7. How does the spindle apparatus distribute chromosomes to the daughter cells?
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8. What is the role of the kinetochores and the microtubules?
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9. How does cytokinesis differ in animal and plant cells? Label the diagrams below.
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10. Eukatyotic mitosis is thought to have evolved from _________________________________
11. Why is the regulation of the cell cycle critical to normal cells?
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12. What is the G1 checkpoint and where does it fit into the cycle?
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13. What evidence is there that regulation is chemical in nature?
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14. Identify the role of the following in the cell cycle clock:
a. Kinase _________________________________________________________________
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b. Cyclin _________________________________________________________________
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c. CDKs _________________________________________________________________
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15. Describe the mechanism for regulating the passage of the cell into anaphase.
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16. Describe what triggers mitosis from G2.
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17. What is the role of ubiquitin?
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18. Describe a model for an external signal for growth.
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19. What happens when cancer develops?
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20. What is the role of p53?
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