Cell Biology Cell Division II: Mitosis by David Warmflash, MD, Nathan H Lents, Ph.D. Reading Quiz Teach with this 1. Mitosis occurs at the same rate in all cells. true false 2. Chromatin is ____ another name for chromosomes. the name for the process of cell division. the name of the dye Fleming used on salamander embryo cells. the material of which chromosomes are made. 3. What did Flemming’s work with salamander embryos show? That salamander cells do not have visible chromosomes. That it was possible to create a dye that did not kill cells. That the structures inside of cells were part of the life process. That cells store artifacts from outside of the organism. 4. Which is a true statement about the phases of cell division that we call mitosis? The phases of cell division are the same in the cells of all living things. The phases of cell division occur in bacteria. The phases of cell division occur in a random order. The phases of cell division are cyclical. 5. The characteristics of an organism are determined by the organism’s ____. genome centromeres kinetochores histones 6. As mitosis begins, the nucleus contains ____ one copy of the organism’s genome. two copies of genetic sequence of the organism. three copies of the genome of the organism. none of the genes of an organism. 7. Which was NOT one of Fleming’s original stages of cell division? prophase metaphase prometaphase telophase 8. What happens during prophase? The nucleolus disappears from the nucleus. The cell membrane around the nucleus breaks down. The two identical chromatids of each chromosome separate. A new nuclear membrane forms. 9. The larger the organism, the more chromosomes it has. true false 10. Which of the following is not one of the five phases of mitosis? prometaphase anaphase interphase telophase 11. Why are certain cancers are thought to result from cells missing the G2 phase of interphase? The G2 phase is a quality-control step before the cell undergoes mitosis. The G2 phase slows down cell division, keeping rapidly dividing cancer cells in check. Special cancer-fighting agents are manufactured during G2. When the G2 step is skipped, it means that other important steps are likely skipped as well, leading to cancer. 12. A cancer treatment drug is likely to be most effective if ____ it doesn’t interfere with cell division. it forces cell division. it slows down mitosis. it speeds up mitosis. Score Quiz
