Which of the Following is Formed by Oxidation of a DNA

Question

Which of the following is formed by oxidation of a DNA base?
A)uracil
B)8-oxoguanine
C)7-methylguanine
D)thymine dimer
E)all of the above

Accepted Answer

8-oxoguanine is formed by oxidation of the base guanine in DNA. Uracil is not a DNA base, it is a RNA base. 7-methylguanine is not formed by oxidation of DNA base, it is a naturally occurring base in DNA. Thymine dimer is a type of DNA damage caused by UV radiation.