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Multiple Choice
How is the cell division of cancer cells misregulated?
A
Cancer cells bypass normal cell cycle checkpoints.
B
Cancer cells divide only in response to external growth signals.
C
Cancer cells undergo apoptosis more frequently than normal cells.
D
Cancer cells have a reduced rate of mitosis compared to normal cells.
Verified step by step guidance
1
Understand that normal cell division is tightly regulated by the cell cycle, which includes checkpoints to ensure cells only divide when conditions are right.
Recognize that cancer cells often bypass these normal cell cycle checkpoints, allowing them to divide uncontrollably.
Note that cancer cells do not require external growth signals to divide, unlike normal cells which rely on such signals to regulate their growth.
Understand that apoptosis, or programmed cell death, is a mechanism to remove damaged or unnecessary cells. Cancer cells often evade apoptosis, allowing them to survive longer than normal cells.
Realize that cancer cells typically have an increased rate of mitosis compared to normal cells, contributing to the rapid growth of tumors.