One theory of aging is that it is caused by an accumulation of damage to cell DNA caused by reactive by-products of cell metabolism.
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Q17: Those who are married live longer than
Q18: Normal cells grown in the laboratory do
Q19: No life extension therapy has been documented
Q20: It is hypothesized that females have a
Q21: Human growth hormone injections are now known
Q23: Scientists generally agree that the basic cause
Q24: Genes are composed of chromosomes.
Q25: DHEA is a hormone made by the
Q26: Many well designed studies confirm the anti-aging
Q27: Shorter people live longer than taller people.
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