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Why is collagen classified as a protein?

A: It is found in a tissue.
B: It is made up of amino acids.
C: It is made up of twisted chains.
D: It is found throughout the human body.

2 Answers

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the answer is B: It is made up of amino acids.

User Derchambers
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B: It is made up of amino acids.

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User Pychopath
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