Cancers are groups of cells that divide uncontrollably because they
A) are always in the G0 phase.
B) never enter the cell cycle.
C) are unable to respond to the negative internal or external signals that keep the cell from dividing.
D) are stuck at the metaphase plate.

Question

Quizplus · Accepted Answer

Cancer cells are unable to respond to the negative internal or external signals that normally keep the cell from dividing. This loss of cell cycle control leads to uncontrolled growth and division, which is a hallmark of cancer. Cells that are in G0 are not actively dividing, so A is incorrect. Similarly, cells that never enter the cell cycle (B) would not be dividing uncontrollably. Finally, cells stuck at the metaphase plate (D) are not dividing at all as they are still in mitosis.

Cancers Are Groups of Cells That Divide Uncontrollably Because They