Question

Your body contains tens of thousands of different proteins, each with a specific structure and function. The unique three-dimensional shape of each of these diverse proteins is based on several superimposed levels of structure. Which of the following statements is/are accurate descriptions of proteins? Select all that are correct. a. The primary structure of a protein is the order of amino acids in a polypeptide, as coded for in the DNA of a gene. b. The 20 amino acids found in proteins differ in the composition of their R groups. c. Secondary structures, which include the alpha helix or beta pleated sheet, are held together by ionic bonds between R groups. d. Tertiary structure is the overall shape of a polypeptide, which may be stabilized by hydrophobic interactions and ionic bonds. e. Quaternary structure is only found in proteins that have more than one polypeptide subunit

Answer 1

Answer: A

Step-by-step explanation:

The primary structure of a protein is the order of amino acids in a polypeptide, as coded for by the DNA of a gene.