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The two DNA strands run in opposite directions, described as:

ABidirectional
BConcentric
CPerpendicular
DAntiparallel
Answer & Solution
Correct answer: D. Antiparallel
1. The 3 prime end of one faces the 5 prime end of the other. 2. The strands are antiparallel. 3. Sugar and phosphate form the backbone. _Source: OpenStax Biology 2e, Chapter 14, DNA Structure and Function (CC BY 4.0)._
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