Which theory of aging supposes that we age because our cells have a built-in limit on the number of times they can reproduce?
A) cellular clock theory
B) wear-and-tear theory
C) stopwatch theory
D) free-radical theory

Question

Quizplus · Accepted Answer

The cellular clock theory suggests that we age because our cells have a built-in limit on the number of times they can reproduce. This is because each time a cell reproduces, its telomeres (the protective caps at the ends of chromosomes) shorten, until eventually the cell can no longer divide. This limit on cell reproduction is called the Hayflick limit, named after Leonard Hayflick who discovered it in the 1960s.

Which Theory of Aging Supposes That We Age Because Our