level: 3.8 The cell cycle
Questions and Answers List
level questions: 3.8 The cell cycle
| Question | Answer |
|---|---|
| Cancer and the control of mitosis | - Mitosis + cell cycle are controlled by genes - Cancer is the uncontrollable division of cells - caused by a mutation - Forms tumour - Tumour invades surrounding tissues |
| Chemotherapy | - Stops cells dividing - By preventing DNA from replicating - Inhibits the metaphase stage of mitosis by interfering with spindle formation |
| Disadvantages to chemotherapy | - Can disrupt cell cycle of normal cells such as hair-producing cells, leading to hair loss |
| The three stages of the cell cycle | - Interphase - Nuclear division - Cytokinesis |
| Interphase | - Most of the cell cycle - No division takes place |
| Nuclear division | - Nucleus divides into either 2 or 4 |
| Cytokinesis | - Cytoplasm divides into either 2 or 4 cells |