Which of the following statements regarding hydrogen bonding in secondary structures is true?
A) Both a-helices and b-sheets only use intrachain hydrogen bonds.
B) Both a-helices and b-sheets only use interchain hydrogen bonds.
C) a-helices only use intrachain hydrogen bonds and b-sheets can use either intrachain or interchain hydrogen bonds.
D) a-helices can use either intrachain or interchain hydrogen bonds and b-sheets only use interchain hydrogen bonds.

Question

Quizplus · Accepted Answer

Alpha-helices only use intrachain hydrogen bonds, while beta-sheets can use either intrachain or interchain hydrogen bonds. The statement in option A is incorrect because beta-sheets also utilize interchain hydrogen bonding between adjacent chains. The statement in option B is incorrect because alpha-helices also utilize interchain hydrogen bonding in structures like coiled coils. The statement in option D is incorrect because both alpha-helices and beta-sheets can use intrachain or interchain hydrogen bonds.

Which of the Following Statements Regarding Hydrogen Bonding in Secondary