Which statement best describes the hydrogen bonding patterns in beta sheets compared to alpha helices?

• A. Neither beta sheets nor alpha helices can form hydrogen bonds.
• B. Both beta sheets and alpha helices can form interchain hydrogen bonds.
• C. Alpha helices can form both interchain and intrachain hydrogen bonds, while beta sheets can only form intrachain bonds.
• D. Beta sheets can form both interchain and intrachain hydrogen bonds, while alpha helices can only form intrachain bonds.

Answer: (D)