Which of the Following Is Characteristic of An $\alpha$ -Helix?
A)Hydrogen Bonds Between -NH Groups on One Part of

question 17

Multiple Choice

Which of the following is characteristic of an $\alpha$ -helix?

• A)Hydrogen bonds between -NH groups on one part of the chain and C=O groups on nearby amino acids cause the protein to coil with the amino acids' R groups pointing outward.
• B)Dipole-dipole interactions between polar side groups in one part of the chain and C=O or -NH groups on nearby amino acids cause the protein to coil with the amino acids' R groups pointing outward.
• C)London forces between hydrophobic regions in the amino acid sequence cause the protein to coil up in order to have hydrophilic regions of the chain point outward.
• D)Single-strand proteins interact via hydrogen bonds,forming coils in which polar side groups point outward.
• E)Side-by-side zigzag chains of amino acids held together by hydrogen bonds aggregate to form a coiled structure held together by intermolecular forces.

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