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Exposure to Ultraviolet Light Causes the Skin to Darken by Stimulating

Question 76

Multiple Choice

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

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

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