Biology I—Chapter 1

Biology I—Chapter 10 Cell Growth and Division
After reading pages 241-245, I can: (terms)

1. give two reasons why cells divide rather than continuing to grow indefinitely.
2. give the name for the cells produced through cell division.
3. tell what a cell must do with its DNA before it can split into two smaller cells.
4. contrast mitosis and cytokinesis.
5. name the structures in the nucleus (made of DNA) that serve to organize the genetic material when it is time for cells to split.
6. tell how many chromosomes human cells have.
7. give the name for the two identical components that are formed by replication and make up the chromosomes.
8. name the area near the middle of the sister chromatids where they attach to each other before they separate during mitosis.
9. give the collective name for the series of events the cell goes through as it grows and divides.
10. give the name for the long period of growth that occurs between cell splitting.

After reading pages 245-248, I can: (terms)

1. tell what the M in M-phase stands for; tell what happens during this phase.
2. tell what goes-on during the S-phase.
3. tell what the G’s stand for in the G₁ and G₂ phases.
4. give the collective name for the longest part of the cell cycle; name the three phases included in this part of the cycle.
5. tell what happens during the G₁phase of the cell cycle.
6. tell what happens to the G₂phase of the cell cycle.
7. give the collective name for the process that involves the splitting of the nucleus of the cell; name the four phases of this process.
8. name the first (and longest) phase of mitosis where the chromatin becomes visible as chromosomes, the centrioles appear, the nucleolus disappears, and the nuclear envelope breaks down.
9. name the second phase of mitosis during which the chromosomes line up across the center of the cell.
10. name the third phase of mitosis during which the sister chromatids separate at their centromeres and become two clusters of individual chromosomes.
11. name the final phase of mitosis where the nucleus re-forms around the new clusters of chromosomes, the chromosomes begin to break apart into chromatin once again, and the nucleolus reappears.

After reading pages 248-253, I can: (terms)

1. explain what happens during cytokinesis; name the phase of mitosis that is usually occurring when this process takes place.
2. give the collective name for the family of proteins discovered by Tim Hunt (Great Britain) and Mark Kirschner (U. S.) that regulate the timing of the cell cycle in eukaryotic organisms.
3. contrast internal regulators and external regulators of cells.
4. tell how an organism develops cancer.
5. describe a tumor; *contrast a benign and malignant tumor.
6. *name the ultimate origin of every cell in the body.
7. describe and give the function of stem cells.
8. name the best (and easiest) type of stem cells to find.