Which of the following are thought to cause aging?
A) Death genes are turned on later in life causing cells to deteriorate.
B) Free radicals damage the DNA of a cell past the point where successful accurate replication can occur.
C) Mitochondrial DNA damage results in the loss of proteins and therefore energy production ability.
D) After a certain number of cell divisions,a cell line is pre-programmed to stop dividing and dies.
E) All of these are theories on why we age.
Correct Answer:
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A) exhibit specificity.
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A)
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