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   In science, we have been learning about DNA and its structure. People always say that it looks like a ladder, but there is a term for it. The term it goes by is double helix. There are four things known as bases that make up DNA. These four bases are cytosine, guanine, adenine, and thymine. Only cytosine pairs with guanine, and only adenine pairs with thymine. These are known as base pairs.
   The things that give DNA their helix shape are two long polymers called nucleotides.Only cytosine pairs with guanine, and only adenine pairs with thymine. These are known as base pairs.




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