Multiple Choice
How does the p53 protein help prevent the formation of cancer cells?
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11. Cell Division
Cancer
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How do cancer cells differ from normal cells in terms of growth and division?
A
Cancer cells stop dividing once they reach a certain size.
B
Cancer cells divide at a slower rate than normal cells.
C
Cancer cells divide only when nutrients are abundant.
D
Cancer cells divide uncontrollably and ignore regulatory signals.
Verified step by step guidance1
Understand the basic cell cycle: Normal cells go through a regulated cell cycle, which includes phases such as G1, S, G2, and M. Each phase is controlled by specific checkpoints that ensure the cell is ready to proceed to the next stage.
Learn about regulatory signals: Normal cells respond to regulatory signals that control their growth and division. These signals include growth factors, which promote cell division, and inhibitory signals, which prevent it when necessary.
Identify the characteristics of cancer cells: Cancer cells often have mutations that allow them to bypass these regulatory checkpoints. This means they can continue to grow and divide even when they should not, leading to uncontrolled cell proliferation.
Recognize the concept of contact inhibition: Normal cells exhibit contact inhibition, meaning they stop dividing when they come into contact with other cells. Cancer cells often lose this ability, allowing them to grow over each other and form tumors.
Understand the implications of uncontrolled division: Because cancer cells divide uncontrollably, they can form masses of cells called tumors. These tumors can invade nearby tissues and spread to other parts of the body, a process known as metastasis.
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