自然科學
大學
2. Eric uses a computer software to simulate a 20-residue peptide in different structures. Structure A is an a-helix structure; structure B is a ẞ-strand; structure C is a helix in the collagen structure. The length of these structures should be:
(A) C>B>A
(B) C>A>B
(C) B>A>C
(D) A>B>C
(E) B>C>A
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