DNA definition, DNA meaning | English dictionary

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DNA

  

      n   deoxyribonucleic acid; a nucleic acid that is the main constituent of the chromosomes of all organisms (except some viruses). The DNA molecule consists of two polynucleotide chains in the form of a double helix, containing phosphate and the sugar deoxyribose and linked by hydrogen bonds between the complementary bases adenine and thymine or cytosine and guanine. DNA is self-replicating, plays a central role in protein synthesis, and is responsible for the transmission of hereditary characteristics from parents to offspring  
   See also       genetic code  


complementary DNA  
      n   a form of DNA artificially synthesized from a messenger RNA template and used in genetic engineering to produce gene clones,   (Abbrev.)    cDNA  
DNA fingerprinting   , profiling  
      n      another name for       genetic fingerprinting  
recombinant DNA  
      n   DNA molecules that are extracted from different sources and chemically joined together; for example DNA comprising an animal gene may be recombined with DNA from a bacterium  
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