when did he discover it?
1869.
DNA
DNA was first isolated by the Swiss physician Friedrich Miescher who, in 1869, discovered a microscopic substance in the pus of discarded surgical bandages. As it resided in the 
how does the structure of a dna molecule help it store large amounts of information UNANSWERABLE what are its features? It is composed of two polynucleotide chains and each nucleotide is composed of one of four nitrogen-containing nucleobases - cytosine, guanine, adenine or thymine. who discovered it? Friedrich Miescher. how can it be classified as? The nucleobases are classified into two types: the purines, A and G. where does he belong to? Switzerland.
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DNA [SEP] History
DNA was first isolated by the Swiss physician Friedrich Miescher who, in 1869, discovered a microscopic substance in the pus of discarded surgical bandages. As it resided in the nuclei of cells, he called it "nuclein". In 1878, Albrecht Kossel isolated the non-protein component of "nuclein", nucleic acid, and later isolated its five primary nucleobases. In 1909, Phoebus Levene identified the base, sugar, and phosphate nucleotide unit of the RNA (then named "yeast nucleic acid"). In 1929, Levene identified deoxyribose sugar in "thymus nucleic acid" (DNA). Levene suggested that DNA consisted of a string of four nucleotide units linked together through the phosphate groups ("tetranucleotide hypothesis").