Use the Following Information to Answer This Question

question 3

Multiple Choice

Use the following information to answer this question:
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?

• A) the number of skin cells
• B) the type of light
• C) the length of time the cells are exposed to UV light
• D) the untreated cells
• E) the amount of DNA damage in the cells

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Definitions:

Carbon Dioxide

A gas without color or smell, created from burning carbon and organic compounds, and emitted during breathing, which is taken in by plants during the process of photosynthesis.

Arsenic

Referred to as a semimetallic chemical element, recognized for its role in historical poisoning cases, it has applications in electronics and wood preservation.

Lethal Dosage

The amount of a substance required to cause death in a living organism, often abbreviated as LD.

Mg

The chemical symbol for magnesium, a shiny gray solid that has the atomic number 12 and is an essential element for living cells.