CELL DIVISION
CELL DIVISION AND CANCEROUS CELLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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skip check points, divide slower, and do not have regulatory proteins.
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skip check points, divide faster, and have regulatory proteins.
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skip check points, divide faster, and do not have regulatory proteins.
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skip don’t check points, divide faster, and do not have regulatory proteins.
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Detailed explanation-1: -In cancer, the cells often reproduce very quickly and don’t have a chance to mature. Because the cells aren’t mature, they don’t work properly. And because they divide quicker than usual, there’s a higher chance that they will pick up more mistakes in their genes.
Detailed explanation-2: -For instance, cancer cells: grow in the absence of signals telling them to grow. Normal cells only grow when they receive such signals. ignore signals that normally tell cells to stop dividing or to die (a process known as programmed cell death, or apoptosis).
Detailed explanation-3: -Tumors often acquire mutations that disable checkpoints and cancer cells can therefore progress unimpeded into S-phase, through G2 and into mitosis with chromosomal DNA damage.
Detailed explanation-4: -Mutated genes don’t work properly because the instructions in their DNA get mixed up. This can cause cells that should be resting to divide and grow out of control, which can lead to cancer.