58. When a polymer of 36-residue forms an α-helix, how many repeats would you expect it to be? (A) 7 (B) 8 (C) 9 (D) 10

4. Which description is NOT correct? (A) A nucleic acid consists of four kinds of bases linked to a sugar–phosphate backbone. (B) A pair of nucleic acid strands with complementary sequences can form a double-helical structure. (C) DNA is a structurally rigid molecule that only exist in a specific helical form. (D) Double-stranded DNA can wrap around itself to form a supercoiled structure.

58. When a polymer of 36-residue forms an α-helix, how many repeats would you expect it to be?
(A) 7
(B) 8
(C) 9
(D) 10

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