Use the information gathered in the Protein Architecture Molecular Structure Tutorial to answer the question.
Classify each phrase as a description of α helices, β sheets, β turns, or, "All" if it describes all three.
α Helices
β Sheets
β Turns
All
Answer Bank
backbone NH groups are hydrogen-bonded to backbone C=O groups
peptide bond of residue n is hydrogen-bonded to residue n + 4
electric dipole of peptide bonds generates a net dipole
peptide bond of residue n is hydrogen-bonded to residue n + 3
successive R groups point in opposite directions
