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Understanding Cell Division and Mitosis Process

Learn about cell division and mitosis process including changes in volume and surface area, DNA replication, phases of mitosis, and the role of essential proteins like cyclins.

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Understanding Cell Division and Mitosis Process

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  1. As a cell becomes larger, its • a. volume increases faster than its surface area. • b. surface area increases faster than its volume. • c. volume increases, but its surface area stays the same. • surface area stays the same, but its volume increases • a.

  2. Which of the following happens when a cell divides? • a. The cell’s volume increases. • b. It becomes more difficult for the cell to get rid of wastes. • c. Each daughter cell receives its own copy of the parent cell’s DNA. • It becomes more difficult for the cell to get enough oxygen and nutrients. • c

  3. After cell division, each daughter cell has • a. a lower surface area/volume ratio than the parent cell. • b. a higher surface area/volume ratio than the parent cell. • more DNA in its nucleus than the parent cell. • less DNA in its nucleus than the parent cell. • b

  4. 10. The structure labeled A in Figure 10–5 is called the • a. centromere. • b. centriole. • c. sister chromatid. • spindle. • a

  5. When during the cell cycle are chromosomes visible? • a. only during interphase • b. only when they are being replicated • c. only during cell division • only during the G1 phase • c

  6. Which of the following is a correct statement about the events of the cell cycle? • a. Little happens during the G1 and G2 phases. • b. DNA replicates during cytokinesis. • c. The M phase is usually the longest phase. • Interphase consists of the G1, S, and G2 phases. • d

  7. When during the cell cycle is a cell’s DNA replicated? • a. G1 phase • b. G2 phase • c. S phase • M phase • c

  8. The process by which a cell divides into two daughter cells is called • a. cell division. • b. metaphase. • c. interphase. • mitosis. • d

  9. Compared to small cells, large cells have more trouble • a. dividing. • b. producing daughter cells. • c. storing needed materials and waste products. • moving needed materials in and waste products out. • d

  10. The structures labeled B in Figure 10–5 are called a. centromeres. b. centrioles. c. sister chromatids. d. spindles.

  11. The first phase of mitosis is called • a. prophase. • b. anaphase. • c. metaphase. • interphase. • a

  12. During which phase of mitosis do the chromosomes line up along the middle of the dividing cell? • a. prophase • b. telophase • c. metaphase • Anaphase • c

  13. Cell division is represented in Figure 10–3 by the letter • a. A. • b. B. • c. C. • D. • d

  14. Which of the following represents the phases of mitosis in their proper sequence? • a. prophase, metaphase, anaphase, telophase • b. interphase, prophase, metaphase, anaphase, telophase • c. interphase, prophase, metaphase, telophase • prophase, anaphase, metaphase, telophase • a

  15. Which of the following is a phase of mitosis? • a. cytokinesis • b. interphase • c. prophase • S phase • c

  16. The two main stages of cell division are called • a. mitosis and interphase. • b. synthesis and cytokinesis. • c. the M phase and the S phase. • mitosis and cytokinesis. • d

  17. Which of the following explains why normal cells grown in a petri dish tend to stop growing once they have covered the bottom of the dish? • a. The cells lack cyclin. • b. The petri dish inhibits cell growth. • c. Contact with other cells stops cell growth. • Most cells grown in petri dishes have a defective p53. • c

  18. Which of the following are external regulators of the cell cycle? • a. cyclins • b. growth factors • c. mitotic spindles • cancer cells • b

  19. What is the role of the spindle fibers during mitosis? • a. They help separate the chromosomes. • b. They break down the nuclear membrane. • c. They duplicate the DNA. • They make the chromosomes visible. • a

  20. Cyclins are a family of closely related proteins that • a. regulate the cell cycle. • b. produce p53. • c. cause cancer. • work to heal wounds. • a

  21. A cell with a defective p53 gene is likely to • a. stop responding to growth regulators. • b. stop dividing to produce daughter cells. • c. generate hormones that combat tumors. • produce cells without a defective p53 gene. • a

  22. Why are stem cells important? • a. They have specialized DNA. • b. They are incapable of becoming cancer cells. • c. They have the potential to undergo cell division. • They have the potential to develop into other cell types. • d

  23. Cancer is a disorder in which some cells have lost the ability to control their a. size. b. spindle fibers. c. growth rate. d. surface area. c

  24. Cancer cells form masses of cells called • a. tumors. • b. cyclins. • c. growth factors. • p53. • a

  25. When cells are grown in a laboratory, which of the following is a factor that can stop normal cells from dividing? • a. contact with other cells • b. growth factors • c. a cut in the skin • injection of cyclin • a

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