The DNA in human’s nongametic cells contains six billions base pairs. It is estimate that about 10,000 DNA alters takes place in the cell in one day. There are quickly repaired so that only a few (1 to 5) mutations accumulate in one cell in year.
a) What percentage of base pairs is altered each day?
b) If cell can withstand up to 0.0001% alteration of the DNA on any given day how many base pairs can be changed?
c) What percentage of DNA changes which occur in one cell in one year escape proof reading and repair process?
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