How does the rise per residue of an alpha helix compare to that of beta sheets?

• A. The rise per residue of an alpha helix is larger than that of both antiparallel and parallel beta sheets.
• B. The rise per residue of an alpha helix is the same as that of antiparallel beta sheets.
• C. The rise per residue of an alpha helix is the same as that of parallel beta sheets.
• D. The rise per residue of an alpha helix is significantly smaller than that of both antiparallel and parallel beta sheets.

Answer: (D)