1. What is meant by the cell cycle or cell division cycle? 2. In what type of cells --- prokaryotes or eukaryotes --- does the cell cycle occur? 3. Name the 2 main PHASES of the cell cycle. 4. is in between the times when a cell is dividing. 5. What is occurring in a cell during interphase? 6. What is occurring during the mitosis phase? 7. A fertilized cell develops into a organism during the cell cycle. 8. Name three things that form during the cycle. Cell cycle and division cycle ¨is the series of events that take place in a eukaryotic cell between its formation and the moment it replicates itself. These events can be divided in two main parts: inter phase (in between divisions phase grouping G1 phase, S phase, G 2 phase), during which the cell is forming and carries on with its normal metabolic functions; the mitotic phase (M mitosis), during which the cell is replicating itself.¨ prokaryotes and eukaryotes prokaryotes 2 INTERPHASE Interphase is a phase of the cell cycle, defined only by the absence of cell division. During interphase, the cell obtains nutrients, and duplicates (copies) its chromatids (genetic material). The genetic material or chromatids are located in the nucleus of the cell and are made of the molecule DNA. 9. What process NEVER occurs in interphase? 10. Cells obtain and duplicate or copy their or genetic material during interphase. 11. Where are chromatids found in a cell? 12. Chromatids are made of a molecule called . Chromatids are connected by the centromere and have a LONG AND SHORT ARM. 3 Label the parts of the chromosome including the long and short arms. 1. 2. 3. 4. Most eukaryotic cells spend most of their time in interphase. For example, human skin cells, which divide about once a day, spend roughly 22 hours in interphase. About 90 percent of cells are in interphase. Some cells, such as nerve cells, can stay in interphase for deca