Melanin Physiology: Melanin Absoprtion of UV Light and Internal Conversion to Heat

Melanin Physiology: Melanin Absoprtion of UV Light and Internal Conversion to Heat

Assessment

Interactive Video

Science, Biology, Physics, Chemistry

University

Hard

Created by

Quizizz Content

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The video explains the importance of melanin in protecting skin DNA from UV light. It covers the mechanism of DNA mutation through thymine dimers and how melanin acts as a protective barrier. The structure of melanin, including its monomers, is discussed, along with its mechanism of action, which involves absorbing UV light and dissipating energy as heat to prevent DNA damage.

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary function of melanin in the skin?

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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