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The structure of DNA is a double helix formed by two strands of DNA sequence.
This sequence consists of 4 different nucleotides- Adenine, Thymine, Cytosine and
Guanine. How do the nucleotides on one strand interact with the nucleotides on the
second strand to maintain the helical shape of DNA?
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1 Answer

Complementary Base Pairing.
Adenine complementary base pairs with Thymine and Guanine complementary base
pairs with Cytosine.
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