Which of the following best describes how amino acids affect the tertiary structure of a protein? The number of amino acids determines the tertiary structure of the protein. The number of amino acids determines the tertiary structure of the protein. A The interactions of the different R -groups with other R -groups and with their environment determine the tertiary structure of the protein. The interactions of the different R -groups with other R -groups and with their environment determine the tertiary structure of the protein. B The R -group of the last amino acid that is added to a growing polypeptide chain determines the next amino acid that is added to the chain. The R -group of the last amino acid that is added to a growing polypeptide chain determines the next amino acid that is added to the chain. C The sequence of the amino acids in the polypeptide chain determines the protein’s primary structure but has no effect on its tertiary structure.