Which of the Statements Concerning Protein Structure Is NOT True

Which of the statements concerning protein structure is NOT true?

A) The primary structure of a protein describes the unique sequence of amino acids in the protein chain.
B) Secondary structure describes the peptide bonds joining the amino acids together in the protein chain.
C) Tertiary structure describes the overall three dimensional shape of a protein.
D) Quaternary structure describes the association of two or more polypeptide chains to form one functioning protein unit.
E) Hydrogen bonding,disulfide bonds,salt bridges,and van der Waals forces are responsible for maintaining the tertiary structure of a protein.