試題詳解

73. The thickness of endoplasmic reticulum membrane is about 37.5 Å. Which one of the followings is closest to this length?
(A) alpha-helix with 10 amino acid residues long
(B) alpha-helix with 40 amino acid residues long
(C) alpha-helix with 80 amino acid residues long
(D) B-DNA with 10 base pairs long
(E) B-DNA with 40 base pairs long