A) \[10\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[20\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[34\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[35\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: B
Solution :
The width of the DNA molecule is 20 A, whereas two strands are in twined around one another and each complete coil measures 3.4 nm (10 bases long).
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