Which of the following is not a reason for the following statement to be incorrect concerning the alpha-helix and beta-sheet secondary structures? "alpha helices and beta sheets are stabilized by intermolecular ionic interactions between amino acid r groups, which have no influence on the type of secondary structure formed." which of the following is not a reason for the following statement to be incorrect concerning the alpha-helix and beta-sheet secondary structures? "alpha helices and beta sheets are stabilized by intermolecular ionic interactions between amino acid r groups, which have no influence on the type of secondary structure formed." alpha helices and beta sheets are characterized by interactions between the nh and co groups, not the r groups, along the polypeptide backbone. alpha helices and beta sheets are stabilized by hydrogen bonds, not ionic bonds. alpha helices have only intramolecular interactions, whereas beta sheets can have intramolecular and intermolecular interactions. all of the other answer choices are reasons that the statement is incorrect.