How does UV light exhibit its germicidal effect?
A kills bacteria and viruses
B. heats up the bacteria and viruses
C. disrupts the reproductive abilities of bacteria and viruses
D. interferes with the respiratory processes of bacteria and viruses
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Answer:
C
Explanation:
UV-C light is germicidal – i.e., it deactivates the DNA of bacteria, virus and other pathogens and thus destroys their ability to multiply and cause disease. Specifically, UV-C light causes damage to the nucleic acid of microorganisms by forming covalent bonds between certain adjacent bases in the DNA.