Question

question 26
which of the following is an amino acid?
homocysteine
tryptophan
bile
hydrochloric acid

Explanation:

Amino acids are the building - blocks of proteins. Tryptophan is an essential amino acid. Homocysteine is a non - proteinogenic amino acid derivative. Bile is a fluid produced by the liver for digestion, and hydrochloric acid is a component of gastric juice.

Answer:

B. tryptophan