All of the following statements about the alpha-helix are true EXCEPT:
A) the alpha-helix is right-handed.
B) there are 3.6 amino acids per turn of the alpha-helix.
C) the R groups of the amino acids are externally directed.
D) the alpha-helix is stabilized primarily by hydrophobic interactions.
E) the structure of the alpha-helix was predicted before it was observed in a protein

Question

Quizplus · Accepted Answer

The alpha-helix is primarily stabilized by hydrogen bonding between the carbonyl group of one amino acid and the amino group of another amino acid, not by hydrophobic interactions.

All of the Following Statements About the Alpha-Helix Are True