The structure of DNA is called a double helix, which looks like a twisted staircase. The sugar and phosphate make up the backbone, while the nitrogen bases are found in the center and hold the two strands together. The nitrogen bases can only pair in a certain way: A pairing with T and C pairing with G.
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Explanation:
The structure of DNA is called a double helix, which looks like a twisted staircase. The sugar and phosphate make up the backbone, while the nitrogen bases are found in the center and hold the two strands together. The nitrogen bases can only pair in a certain way: A pairing with T and C pairing with G.