There is evidence that some oxidative damage to DNA occurs at the nucleotide level, with oxidation of

Question:

There is evidence that some oxidative damage to DNA occurs at the nucleotide level, with oxidation of a nucleotide, followed by incorporation of the damaged nucleotide into DNA.
(a) Describe a pathway by which this could occur.
(b) Propose one or more experiments to test whether your proposed path-way does occur.