Which of the following agents can cause mutations in DNA?

Question

Quizplus · Accepted Answer

All three agents listed are known to cause mutations in DNA. Ultraviolet radiation from sunlight can cause thymine dimers to form in DNA, which can lead to errors in replication or transcription. Aflatoxins are potent carcinogens produced by certain species of Aspergillus molds that can alter the DNA and RNA in cells. Free radicals, which are highly reactive molecules with unpaired electrons, can damage DNA and other biomolecules through oxidation reactions, resulting in mutations. Therefore, all three agents are mutagenic and can cause mutations in DNA.

Which of the Following Agents Can Cause Mutations in DNA