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Bernard M -- Taipei English Tutor

Bernard M - English Conversation / TOEFL / IELTS 一對一英文會話

Sunday, April 10, 2011

Stress and ageing FROM The Economist

"Unlike shoelaces, though, chromosomes replicate themselves from time to time as the cells they are in divide. This shortens the telomere and, after 50-70 such divisions (a number known as the Hayflick limit, after its discoverer), a chromosome can grow no shorter and the cell it is in can divide no more."

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