Final answer:
The hydrophilic/hydrophobic character of amino acid residues is not important to secondary structure,bonds between amino acid residues in the peptide backbone and the steric influence of amino acid residues.
Step-by-step explanation:
The statement that is untrue about protein secondary structure is:
D) The hydrophilic/hydrophobic character of amino acid residues is important to secondary structure
While the hydrophilic/hydrophobic character of amino acid residues is important for the overall folding and stability of a protein, it is not specifically related to secondary structure.
The secondary structure of a protein is primarily determined by the formation of hydrogen bonds between amino acid residues in the peptide backbone and the steric influence of amino acid residues.