Which of the Following Gives the Best Example of a Nonrepetitive

Multiple Choice

Which of the following gives the best example of a nonrepetitive structure in a protein?

A) a random sequence of 12 amino acids with high P_α values forming an α helix
B) an amino acid sequence with the following pattern "…a-b-c-d-e-a-b-c-d-a-b-c-d…"
C) a 13 residue α helix with a Gln at position n+12 which hydrogen bonds to a residue at position n+10
D) All of the above statements describe nonrepetitive protein structures.
E) None of the above describe nonrepetitive protein structures.