7. Which of the following statements about the folding of polypeptides is false? (A) Burial of hydrophobic amino acid R groups to exclude water (B) Alpha helices and beta sheet generally are usually found in different structural layers. (C) Polypeptide segment adjacent to each other in the primary sequence are always far away to each other in the folded structure. (D) Connections between elements of secondary structure do not form knots in most times. (E) Left handed connection between beta strands is very rare.