Question

Which activity would most likely increase the mutation rate in a culture of bacteria being grown in a laboratory experiment?

1) adding more distilled water to the culture
2) adding excess nutrients to the culture
3) exposing the culture to a higher concentration of CO2
4)exposing the culture to ultraviolet radiation

Answer 1

The answer should be 4) as it is known that uv radiation might have an effect on dna, thus causing mutations such as skin cancer in humans.