Which of the Following Statements About α-Keratins Is FALSE

Which of the following statements about α-keratins is FALSE?

A) They include a major class of protein that comprises hair, fingernails and animal skin.
B) Individual molecules are α-helical.
C) There is a strip of contiguous hydrophobic surface making a shallow spiral around the helix.
D) They include a small globular regions covalently linked to the surface.
E) Pairs of α-helices twist about each other in a coiled-coil structure held together entirely by hydrophobic interactions.