8 are chemical units that join to make proteins.
A. Fatty acids
B. Glucose molecules
C. Hormones
D. Amino acids

Explanation:

Well...

Proteins are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chains. There are 20 different types of amino acids that can be combined to make a protein.

Basically, amino acids combine to form a protein cell.

Hope I helped!!!

GL :)

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