50 Use the information gathered in the Protein Architecture Molecular Structure Tutorial to answer the question. Classify each phrase as a description of \( \alpha \) helices, \( \beta \) sheets, \( \beta \) turns, or, "All" if it describes all three. successive R groups point in opposite directions peptide bond of residue \( n \) is hydrogen-bonded to residue \( n+3 \) backbone NH groups are hydrogen-bonded to backbone \( \mathrm{C}=\mathrm{O} \) groups electric dipole of peptide bonds generates a net dipole peptide bond of residue \( n \) is hydrogen-bonded to residue \( n+4 \)