Multiple Choice
Which of the following is true about malignant tumors?
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11. Cell Division
Cancer
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Which of the following statements is true about cancer cells?
A
They can divide uncontrollably and ignore normal regulatory signals.
B
They have a limited number of cell divisions before dying.
C
They always undergo apoptosis when DNA is damaged.
D
They require external growth factors to proliferate.
Verified step by step guidance1
Understand the characteristics of cancer cells: Cancer cells are known for their ability to divide uncontrollably, bypassing normal regulatory mechanisms that govern cell division and growth.
Review the concept of apoptosis: Apoptosis is programmed cell death, which normal cells may undergo when DNA is damaged. Cancer cells often evade apoptosis, allowing them to survive despite DNA damage.
Examine the role of growth factors: Normal cells typically require external growth factors to proliferate. Cancer cells, however, can often produce their own growth signals or bypass the need for external growth factors.
Consider the concept of cell division limits: Normal cells have a limited number of divisions due to mechanisms like telomere shortening. Cancer cells can overcome this limit by activating enzymes like telomerase, enabling indefinite division.
Identify the correct statement: Based on the above characteristics, the true statement about cancer cells is that they can divide uncontrollably and ignore normal regulatory signals.
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