Telomeres,tandem repeat sequences at the ends of chromosomes,generally get shorter after every cell division.The resulting mechanism involves a protein called p53,which ________.
A) puts the cell into a permanently nondividing state
B) causes the cell to enter cell senescence
C) may induce the cell to undergo programmed cell death
D) All of the above.

Question

Quizplus · Accepted Answer

The protein p53 plays a crucial role in regulating cell division and preventing the formation of tumors. When telomeres become too short, p53 can induce the cell to undergo programmed cell death (apoptosis) or enter a permanently nondividing state called cell senescence. Therefore, all of the above options (A, B, C) are correct.

Telomeres,tandem Repeat Sequences at the Ends of Chromosomes,generally Get Shorter