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The rungs of dna are made up of

User MarkusN
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Answer:

They are made up of nucleic acids. Specifically, the nucleic acids adenine, cytosine, guanine, and thymine.

Step-by-step explanation:

Hope this helps!

User KTiwari
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Answer: The rungs of the ladder are formed by complementary pairs of nitrogen bases — A always paired with T and G always paired with C.

Step-by-step explanation:

User Icats
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