p53 is a ____.
A) transcription factor that turns on the expression of cell-division-inhibiting proteins
B) protein encoded by an oncogene
C) protein that promotes entry into the cell cycle when DNA is undamaged
D) hormone used to treat cancer
E) growth-promoting factor

Question

Quizplus · Accepted Answer

p53 is a transcription factor that plays a crucial role in preventing cancer by turning on the expression of genes that inhibit cell division, thereby acting as a tumor suppressor. It is activated in response to DNA damage and other stress signals, leading to cell cycle arrest, DNA repair, senescence, or apoptosis, depending on the context and extent of damage.

P53 Is a ____