Which of the following statements underlie both the error theory of aging and the free radical theory of aging?
A) Biochemical damage accumulates over time, leading to cell death.
B) The rate of cellular death is genetically programmed.
C) The aging body produces fewer growth and repair hormones.
D) Environmental agents such as radiation and heavy metals damage DNA.
A
Feedback:
That the rate of cell death is genetically programmed is a basic tenet of the programmed theory of aging. That the aging body produces fewer growth and repair hormones is a neuroendocrine theory. Although radiation and heavy metals may damage DNA, they are not free radicals, and they need not be the cause of the mutations assumed by the error theory.
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