Watson and Crick advanced the double helix structure model of the DNA in 1953. The DNA is made up of two pieces of nucleotide chains, which is double helix structure with complementary pairing of the bases and winding each other.

 
  • 1953年Watson和Crick提出了DNA的雙螺旋結構模型:DNA分子由兩條多核苷酸鏈組成,這兩條核苷酸鏈通過(guò)堿基的互補配對相互纏繞形成一種雙螺旋結構;
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