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The rungs of the ladder are pairs of 4 types of nitrogen bases (thymines, adenines, guanines, cytosines).

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The pairs are guanine and cytosine (G-C), or adenine and thymine (A-T).
The rungs of the dna ladder are made of alternating sugars and phosophate groups.

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8y ago
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13y ago

They are made of hydrogen bonds. These non-covalent bonds hold the nitrogen bases together.

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Q: What are the middle rungs of the DNA ladder made of?
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what are the ''rungs'' of the DNA ladder made of?

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what are 4 bases that make up the rungs of the DNA ladder


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