All of the following contain amino acids except

All of the following contain amino acids except 






A) hemoglobin.
B) cholesterol.
C) antibodies.
D) enzymes.
E) insulin.






Answer: B


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Post-translational modifications (PTMs) are changes to proteins or peptides that are catalyzed by enzymes after completion of ribosomal translation and it generally have a positive impact on peptide activity. Amino Acids Modification