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Exposure to Ultraviolet Light Causes the Skin to Darken by Stimulating

Question 104

Multiple Choice

Exposure to ultraviolet light causes the skin to darken by stimulating the

A) breakdown of carotene.
B) breakdown of melanin.
C) buildup of bilirubin.
D) activity of the enzyme tyrosinase.
E) activity of the keratinocytes.

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