The primary structure of proteins is the . The primary structure contains the information necessary for the formation of secondary structure, including the and the . Secondary structure of proteins is stabilized by the formation of bonds.

A. amino acid sequence; β pleated sheet; α helix; disulfide
B. α helix; amino acid sequence; β pleated sheet; hydrophobic
C. amino acid sequence; α helix; β pleated sheet; hydrogen
D. amino acid sequence; α helix; β pleated sheet; peptide
E. β pleated sheet; α helix; amino acid sequence; hydrogen