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DNA
Discover the structure of the DNA molecule at the scale of the atoms that compose it.
Open the resourceQuestions about this 3D model
What shape does a DNA molecule have?
DNA generally has a double-helix structure: two strands wound around each other, like a twisted ladder. Each strand has a sequence of sugars and phosphate groups with attached bases.
Which bases pair together in DNA?
The four DNA bases are adenine, thymine, cytosine and guanine. In the double helix, adenine pairs with thymine and cytosine with guanine. These pairs connect the two strands.
Sources: NHGRI