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Mitosis

Part C:

QuestionAnswer
What is the difference between the growth phase and the synthesis phase? The growth phase involves the physical growth in size of the cell but the synthesis phase involves the doubling of chromosomes.
What happens during the Prophase? The centrioles move to the poles of the cell and the nuclear envelope disappears while the chromosomes coil up into visible structures.
What happens during the metaphase? Spindle fibers spun by the Centrioles attach themselves onto the centromeres of the chromosomes.
What happens during the Ananphase? The spindle fibers retract and pull half of the chromosomes to one side and the other half to the other side of the cell.
What happens during the Telophase? Spindle fibers return back into the centrioles and new nuclear envelopes form around the (now) separated bundles of chromosomes.
How many cell check points are there? There are three cell check points.
What happens during the first cell check point? The cell checks to see if it has sufficient nutrients in order to support growth.
What happens during the second cell check point? The cell checks to see if any DNA strands have not been replicated or are damaged.
What happens during the third cell check point? The cell checks to see if any chromosomes have not connected to spindle fibers and have not moved to the opposite poles.
What happens to the cell if any of the cell check points are not fulfilled? The cell will kill itself.
What happens during Cytokenises The cell membrane pinches off in the middles of the two new nuclei, separating it into 2 new daughter cells.
What is apoptosis Apoptosis is when a cell uses Lysosomes to kill itself.
Why would a cell go through apoptosis? If a cell is damaged beyond repair or has been infected by a virus or bacteria, it will go through apoptosis (kill itself)
How many times can cancer cells go through mitosis? Cancer cells can go through mitosis an unlimited number of times.
How is cancer related to tumors? When cancer cells uncontrollably divide, they clump together and start to form a visible clump which is a tumor.
Created by: Bruce Smith
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