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Mathematics 9 Online
OpenStudy (anonymous):

Which of the following best explains Watson and Crick's DNA model? A. DNA is a single stranded molecule,which has nitrogenous bases towards its exterior. B. DNA is a double helix made of two strands linked together with hydrogen bonds. C. DNA is a double helix, which contains nitrogenous bases towards its exterior

OpenStudy (anonymous):

B

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