Transcription: This animation illustrates the three-dimensional structure of DNA. The red and white balls represent the molecules that make up the backbone of DNA. This backbone is made up of two strands which twist together to form the familiar double helix shape. The strands are held in place by nucleotides that link together in the center of the double helix. In this animation, the green balls represent the nucleotide cytosine, the blue balls guanine, the yellow balls adenine, and the orange balls, thiamine. Notice how green balls always link with blue balls in the animation. That's because cytosine and g ...
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