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A scientific study looked at the effect of tanning beds on DNA damage. The scientists took skin cells and exposed them to UV radiation (the type used in indoor tanning beds) for different lengths of time: some for 1 minute, some for 5 minutes, some for 15 minutes, and some for 30 minutes. They then looked for signs of DNA damage and compared the results to cells that had never been exposed to UV light.
-What is the control in this experiment?

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A scientific study looked at the effect of tanning beds on DNA damage. The scientists took skin cells and exposed them to UV radiation (the type used in indoor tanning beds) for different lengths of time: some for 1 minute, some for 5 minutes, some for 15 minutes, and some for 30 minutes. They then looked for signs of DNA damage and compared the results to cells that had never been exposed to UV light.
-What is the control in this experiment?

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The control in this experiment is the untreated cells, which serve as a comparison group to the cells that were exposed to UV radiation for varying amounts of time. By comparing the level of DNA damage in the treated cells to the untreated cells, the scientists can determine the extent to which the UV radiation caused damage to the cells. The other answer choices are not controls in this experiment - they are all variables that the scientists manipulated or measured in order to study the effects of UV radiation on DNA damage.

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