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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.
A 5-carbon sugar, Phoshate group, and a nitrogenous base make nucleotides. The nucleotides are made of adenine, guanine, cytosice, thymine, and uracil. The nucleotides make th â¦ e nucleic acids. Nucleic acids are made in only two types, Deoxyribonucleic acid(DNA) and Ribonucleic Acid (RNA)