January 2005
Taber's Cyclopedic Medical Dictionary;2005, p2154
Reference Entry
A definition of the term "telomere" is presented. It refers to a repetitive segment of DNA that is found on the ends of chromosomes. With each mitotic division, there is a loss of parts of the telomeres of a chromosome. According to a theory of cellular aging, the telomeres act as a biological clock and when they are depleted, the cell dies or becomes much less active.


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