AP BIOLOGY

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 molecules are long chains of amino acids that are folded into a three-dimensional shape. Chemically, an amino acid is a molecule that has a carboxylic acid group and an amine group that are each attached to a carbon atom called the carbon.

Detailed explanation-3: -Proteins are complex organic compounds made up of amino acids linked together by peptide bonds.

Detailed explanation-4: -A protein consists of one or more chains of amino acids (called polypeptides) whose sequence is encoded in a gene.

Detailed explanation-5: -Polymers are large molecules made up of long chains or networks of smaller molecules called monomers. Natural polymers include silk, hair, proteins and DNA, while synthetic (man-made) polymers include polyethylene, polypropylene and polyester.