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Watson and Crick describe structure of DNA1953. Photo: Model of DNA molecule. In the late nineteenth century, a German biochemist found the nucleic acids, long-chain polymers of nucleotides, were made up of sugar, phosphoric acid, and several nitrogen-containing bases.Later it was found that the sugar in nucleic acid can be ribose or deoxyribose, giving two forms: RNA and DNA.atson and Crick describe structure of DNA1953. Photo: Model of DNA molecule. In the late nineteenth century, a German biochemist found the nucleic acids, long-chain polymers of nucleotides, were made up of sugar, phosphoric acid, and several nitrogen-containing bases.
Best Answer: It's a nucleic acid, made up of monomers called nucleotides. A nucleotide consists of three parts: a) A sugar-deoxyribose (ribose in RNA) b) An organic base-adenine, cytosine, guanine and thymine (in DNA.In RNA, there is uracil instead of thymine) c) A phosphate group I hope that helps. :) ILoveMaths07. nucleotide consists of three parts: a) A sugar-deoxyribose (ribose in RNA) b) An organic base-adenine, cytosine, guanine and thymine (in DNA.