Hemoglobin is a globular protein composed of a single polypeptide chain that has one O 2 binding site. 07 Which of the following descriptions best describes the primary structure of proteins. 1 The Four Levels Of Protein Structure The Primary Structure Download Scientific Diagram How many types of amino acids. . Which of the following best describes how amino acids affect the tertiary structure of a protein Answers. Which best describes protein tertiary structure A The sequence of amino acids B. In which case would a scientist choose to use a dissecting microscope rather than a compound microscope. After the amino acids form bonds secondary structure and shapes like helices and sheets the structure can coil or fold at random. If this structure is disrupted or disturbed a protein is said to be denatured which means it is chemically affected and its structure is distorted. The R group is one of the four parts of the amino ac