Test Your Knowledge Of The Human Body With This Basic Anatomy Quiz!

Which protein is found in hair and fingernails?

Retry Correct Incorrect Keratin is the fibrous structural protein that is key in the formation of hair and fingernails. For other animals, it helps to make up their horns, claws, and hooves as well. It can also be found in the outer layer of human skin.

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Universal Images Group via Getty Images

Universal Images Group via Getty Images

Which protein is found in hair and fingernails?

• Insulin
• Calcium
• Keratin
• Elastin