THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -A protein molecule is made from a long chain of these amino acids, each linked to its neighbor through a covalent peptide bond (Figure 3-1). Proteins are therefore also known as polypeptides.

Detailed explanation-2: -Protein polypeptide chains are linear polymers that are assembled from a repertoire of 20 different standard amino acids joined together through peptide bonds from N-terminus to C-terminus.

Detailed explanation-3: -Proteins are long polymers made of amino acids.