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The center of the DNA molecule, the rungs of the ladder, are composed of A. phosphates only. B. nitrogenous bases only. C. phosphates and sugars. D. nitrogenous bases and sugars.
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The center of the DNA molecule, the rungs of the ladder, are composed of

A. phosphates only.
B. nitrogenous bases only.
C. phosphates and sugars.
D. nitrogenous bases and sugars.

User Mmichaa
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1 Answer

1 vote
I think the answer is B. Hope this helps!! :)
User MMelnicki
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