Which of these is a function of the p53 protein?
A) It arrests the cell cycle in cells with damaged DNA.
B) It scavenges improperly folded proteins.
C) It increases the expression of tumor-causing genes.
D) It decreases the expression of tumor suppressor genes.

Question

Quizplus · Accepted Answer

The p53 protein is a tumor suppressor protein that plays a critical role in regulating the cell cycle and preventing the development of cancer. One of its key functions is to arrest the cell cycle in cells with damaged DNA, allowing time for repair or triggering apoptosis (cell death) if the damage cannot be fixed. Option B is incorrect because is a function of chaperone proteins, not p53. Option C and D are also incorrect because p53 acts to decrease the expression of tumor-causing genes and increase the expression of tumor suppressor genes.

Which of These Is a Function of the P53 Protein