Question

amino acids are named after two of their functional groups: the amino group (nh₂), which acts like a base, and the carboxyl group (cooh), which acts like an acid. amino acids also contain a third functional group, often called the r group. in alanine, the r group is a methyl group (ch₃). in serine, the r group is a methyl alcohol (-ch₂oh). choose words to complete the sentence. two amino acids unite by forming a(n) peptide bond between them and releasing a molecule of water. the union of many amino acids forms a macromolecule called a protein.

Explanation:

Amino acids form peptide bonds through a condensation reaction, releasing water. Many amino - acids linked together form proteins, which are important macromolecules in living organisms.

Answer:

Two amino acids unite by forming a(n) peptide bond between them and releasing a molecule of water. The union of many amino acids forms a macromolecule called a protein.