Question Detail
Question
What is the primary mechanism by which UV-C light kills microorganisms?
Correct Answer
Option D is the correct answer.
Detailed Explanation
UV-C light (germicidal UV) primarily kills microorganisms by causing damage to their DNA and RNA, leading to the formation of pyrimidine dimers. These dimers interfere with DNA replication and transcription, ultimately preventing the microbes from reproducing.
Hint
UV radiation is a form of electromagnetic energy. Which cellular macromolecules are most susceptible to its specific wavelength?