What is the primary function of melanin in the skin?
Melanin Physiology: Melanin Absoprtion of UV Light and Internal Conversion to Heat

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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To regulate body temperature
To provide color to the skin
To moisturize the skin
To protect DNA from UV light
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What can cause DNA mutations when exposed to UV light?
Production of vitamin D
Formation of cyclobutane thymine dimers
Loss of skin moisture
Increase in skin temperature
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does melanin help prevent DNA mutations?
By producing antioxidants
By increasing skin thickness
By absorbing UV light
By reflecting UV light
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the two main monomers that make up melanin?
Amino acids and proteins
Dihydroxy indole and dihydroxy indole carboxylic acid
Nucleotides and sugars
Lipids and carbohydrates
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of melanocytes in the skin?
To produce keratin
To produce collagen
To produce elastin
To produce melanin
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What process allows melanin to dissipate absorbed UV energy as heat?
Internal conversion
Radiation emission
Photosynthesis
Fluorescence
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What percentage of UV light is absorbed by melanin?
100%
99.9%
50%
75%
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