what-distinguishes-amino-acid-residues-from-free-amino-acids

Question

What distinguishes amino acid residues from free amino acids?

Accepted Answer

Amino acid residues are linked in a polypeptide chain and lack free ionizable groups.

Answer

Free amino acids are linked in a polypeptide chain.

Answer

Free amino acids lack ionizable groups.

Answer

Amino acid residues have free ionizable groups.