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Andreas93 [3]
3 years ago
9

The two strands of a DNA double helix

Biology
1 answer:
trapecia [35]3 years ago
4 0
Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain. The chemical backbones of the double helix are made up of sugar and phosphate molecules that are connected by chemicals bonds, known as sugar phosphate backbones.
Hope this helps
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