Normal cells have a mechanism that causes them to self-destruct when growth is excessive and cell cycle checkpoints have been ignored. This self-destruct mechanism, called apoptosis, is triggered by diverse stimuli, including normal development and excessive growth. The remaining options do not describe apoptosis.

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What Is Apoptosis

Question 23

Multiple Choice

What is apoptosis?

A) A normal mechanism for cells to self-destruct when growth is excessive
B) An antigrowth signal activated by tumor-suppressor gene Rb
C) A mutation of cell growth stimulated by the TP53 gene
D) The transformation of cells from dysplasia to anaplasia

Correct Answer: