Which of the Following Statements About -Sheet Structures Is

question 81

Multiple Choice

Which of the following statements about -sheet structures is true?

• A) The individual strands of all -sheet structures are connected by turns, helices, or loops.
• B) All amino acid side chains in antiparallel and parallel -sheet structures point to one side of the sheet.
• C) Parallel -sheet structures have backbone amides that directly hydrogen bond between strands, whereas antiparallel -sheets have hydrogen bonds that are offset.
• D) All -sheet structures form a spiraling backbone chain.

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