10) Which phase of the cell cycle does the cell spend the longest time (in norma

Question

10) Which phase of the cell cycle does the cell spend the longest time (in normal cells) and how does this compare to the cell cycle in cancer cells? 11. What part of the cell's life is resting? 12. What part of the cell's life is making new cells? 13. What phases are involved in cell division? 14. What biomolecules regulate the cell cycle? 15. What happens if no check points or if the checkpoints fail? What is apoptosis and why do cells do this? 16. What is the role of spindle fibers during cell division?

Explanation / Answer

10. In normal cells, the cell spends most of the time in the interphase. Interphase is the phase in which the cell carries out metabolic processes and regular activities of maintenance. In cancer cells, the maximum amount of time spent is in the S phase of cell division, where DNA replication occurs. The difference between cancer cells and normal cells is, during interphase, the cells will progress from the G1 phase to the S phase to the G2 phase, where the G2 phase acts as the checkpoint but in cancer cells this checkpoint is not working.

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