Which of the following statements are False?

(i) Parallel b-sheets characteristically distribute hydrophobic side chains on both sides of the sheet, and antiparallel B-sheets are usually arranged with all their hydrophobic residues on one side of the sheet.

(ii) Planarity of the peptide bond means that no rotation occurs about the N-Ca bond while rotation is allowed about the C(O)-N and Ca-C(O) bonds.

(iii) Silk fibers consist of fibroin proteins consisting of alternating A and G or S residues.

(iv) If an aspartic acid residue were present in the interior of a globular protein, it would most likely be deprotonated and thus negatively charged.