The Chemical Structure Formed from the Reaction of a DNA

Question

The chemical structure formed from the reaction of a DNA base with a carcinogen is called
A)A lesion.
B)An adduct.
C)An ultimate carcinogen.
D)A xenobiotic.
E)None of the above.

Accepted Answer

The chemical structure formed from the reaction of a DNA base with a carcinogen is called an adduct. A lesion refers to any abnormality or damage in DNA, not specifically from a carcinogen. An ultimate carcinogen is a type of carcinogen that has been metabolized in the body to become active and able to damage DNA. Xenobiotic refers to any foreign substance in the body, not specifically carcinogens. Therefore, the best choice is B, an adduct.