Melanin Review

What does this image represent?

• weather conditions

• ultraviolet light intensity

• skin color

• altitude

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Traveling away from the equator, what happens in general to the amount of UV intensity?

• The intensity decreases.

• The intensity increases

• The intensity stays the same.

• It is impossible to predict.

What is melanin?

• A protein pigment that absorbs light

• A protein that is waterproof and tough

• A cell found in the epidermis

• A vitamin that helps you sleep

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How does melanin protect DNA from the damaging effects of Ultraviolet light?

• It causes all of the sunlight to reflect off of the surface of your skin

• It doesn't you must use sunscreen

• it activates vitamin D, which repairs any damage caused

• Forms a protective cap over the nucleus of skin cells

The graph in Figure 2 summarizes the age at which people are diagnosed with melanoma, the most serious form of skin cancer. When would you see the most likely chance of developing skin cancer?

• 35-44

• 45-54

• 55-64

• 65-74

Do Biologists classify specific forms of traits as good or bad? For example, short in cats could be classified as good and long hair as bad.

• Yes, traits are always good or bad.

• No, it depends on environmental conditions where they are found.

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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

What are the building blocks of proteins called?

• DNA
• RNA
• Ribosomes
• Amino Acids

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What is a Gene?

• A type of cell.

• A chromosome.

• A segment of DNA that encodes for a protein.

• A code to build the nucleotides of DNA.

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What type of mutation is shown below?

Normal-

GAG-CTC-GAC-AGA

Mutant

GAG CTC-CAC-AGA

• no mutation

• substitution

• insertion

• deletion

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