a. Prophase
b. Metaphase
c. Anaphase
d. Telophase (and cytokinesis)
During which phase of the cell cycle is DNA duplicated? S Phase
9) Why is it important that a cell’s DNA is duplicated before cell division? The DNA needs to be duplicated before the cell divides SO THAT both new cells have the SAME AMOUNT of DNA.
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?
Normal cell- Interphase (90% of the time); Mitosis (10% of time)
Cancer cell- Interphase (less than 90% of time); Mitosis (more than 10% of time)
What part of the cell’s life is resting? G1, S, G2
What part of the cell’s life is making new cells? M phase (PMAT)
What phases are involved in cell division? PMAT
What biomolecules regulate the cell cycle? Proteins
What happens if no check points or if the checkpoints fail?
Cancer cells have escaped the checkpoint and are growing out of control and are dividing very often and can grow into tumors. Why is it a Problem?- because they are too busy dividing and not doing what they are supposed to be doing and getting in the way- disturbing normal functioning
What is apoptosis and why do cells do this?
Apoptosis, is programmed cell death- the cell destructs (because you don’t want damaged cells to continue and divide.) It happens at the checkpoint between G2 and M phases.
What is the role of spindle fibers during cell division?
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