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What forms the rings of the ladder of DNA

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Phosphates and sugars of adjacent nucleotides link to form a long polymer. ... They showed that alternating deoxyribose and phosphate molecules form the twisted uprights of the DNA ladder.
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User Jenssen
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Answer:

The rings 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:

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User Lesque
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