What are horns,nails,and hair made of?

  • A
    Collagen
  • B
    Elastin
  • C
    Keratin
  • D
    Cutin

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Identify the secondary structures of proteins shown below.

Amino acids not synthesized in the body are called

Which of the following proteins is the most abundant in animals?

Which is the most important structural component of the body?

Which of the following is an example of a conjugated protein?

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