Biology of Skin Color

If someone has darker skin tone, then they have a greater percentage of....

• Pheomelanin

• Eumelanin

What organelle synthesis the melanin, stores the melanin, and transports the melanin to the keratinocytes?

• Melanocyte

• Melanin

• Melanosomes

• Pheomelanin

What is Pheomelanin?

• A type of melanin that produces dark brown/black skin

• A type of melanin that produces reddish/yellow pigment

• An enzyme that controls skin color

• An enzyme that produces melanin

Which of the following statements about melanin is most accurate?

• Melanin is found on in human cells and is not present in other organisms.

• Human skin cells contain only one type of melanin.

• The more eumelanin an individual has in their skin cells, the darker their skin.

• The darker an individual's skin color, the more likely ultraviolet (UV) radiation will damage the DNA in their cells.

Which factor is directly responsible for the skin pigmentation you were born with?

• Your exposure to the sun

• Different amounts and types of melanin

• The food you eat

• Weather you live in hot or cold temperatures

Tags

NGSS.HS-LS3-2

What selective advantage did people have to increase melanin production?

• Increased protection from skin cancer

• Increased protection from folate destruction

• Increased synthesis of vitamin D

• All of the above

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

What type of cells create melanin?

• Keratinocyte

• Melanocyte

• Leukocyte

• Erythrocyte

What does melanin protect?

• The nucleus

• Nucleic acid

• Folate

• All of the above

What selective advantage did people have to lose increased melanin production? (Or in other words, to have less melanin?)

• Increased protection from skin cancer

• Increased protection from folate destruction

• Increased synthesis of vitamin D

• All of the above

Tags

NGSS.HS-LS4-4

What is the selective pressure for skin color?

• UVB intensity

• location

• ability to tan

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4