The ABCs of DNA — Part 2

DNA Structure

Nuclear DNA molecules consist of a string of ring-shaped sugar molecules attached to a phosphate backbone on one side forming the sides of the twisted-ladder-like structure and one of the four DNA bases on the other. As the name deoxyribo suggests, the ring-shaped 5-carbon sugar on nuclear DNA has lost an oxygen molecule. There are four bases* that comprise the DNA code: adenine (A), guanine (G), cytosine (C), and thymine (T). The arrangement of these four bases along the…
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