单词	DNA
释义	DNA noun ˌdē-ˌen-ˈā  : any of various nucleic acids that are usually the molecular basis of heredity, are constructed of a double helix held together by hydrogen bonds between purine and pyrimidine bases (see base entry 1 sense 6b) which project inward from two chains containing alternate links of deoxyribose and phosphate, and that in eukaryotes are localized chiefly in cell nuclei compare recombinant dna Illustration of DNA A molecular model Word History Etymology deoxyribonucleic acid First Known Use 1944, in the meaning defined above Phrases Containing DNA DNA fingerprinting DNA polymerase DNA phenotyping DNA methylation junk DNA DNA virus DNA test satellite DNA recombinant DNA mitochondrial DNA See More DNA fingerprinting DNA polymerase DNA phenotyping DNA methylation junk DNA DNA virus DNA test satellite DNA recombinant DNA mitochondrial DNA See More Kids Definition DNA noun ˌdē-ˌen-ˈā  : a large organic molecule that carries genetic information in the chromosomes and resembles a twisted ladder Medical Definition DNA noun ˌdē-ˌen-ˈā  : any of various nucleic acids that are usually the molecular basis of heredity, are constructed of a double helix held together by hydrogen bonds between purine and pyrimidine bases which project inward from two chains containing alternate links of deoxyribose and phosphate, and that in eukaryotes are localized chiefly in cell nuclei called also deoxyribonucleic acid see recombinant dna
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