3. Proteins must fold into their final structures to be functional. Which of the following statements are not true?
(A) Protein tertiary structure is determined by the primary sequence.
(B) Hydrophobic amino acids are buried in the interior.
(C) Structural motifs such as αα or ββ act as seeds around which the rest of the protein folds.
(D) Helper proteins called chaperones may assist protein folding.
(E) Folding begins with disulfide bond formation.