AP BIOLOGY

Detailed explanation-1: -All amino acids contain an amino or NH2 group and a carboxyl (acid) or COOH group. To form polypeptides and proteins, amino acids are joined together by peptide bonds, in which the amino or NH2 of one amino acid bonds to the carboxyl (acid) or COOH group of another amino acid.

Detailed explanation-2: -Amino acids are molecules that combine to form proteins. Amino acids and proteins are the building blocks of life.

Detailed explanation-3: -Amino acids are attached to other amino acids by covalent bonds, known as peptide bonds, which are formed by dehydration synthesis reactions. The carboxyl group of one amino acid and the amino group of the incoming amino acid combine, releasing a molecule of water and forming a peptide bond (Figure 3.7).