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ＤＮＡ具有规则的双螺旋结构 ,其结构的主要特点是 :(1 )ＤＮＡ分子是由两条平行的脱氧核苷酸长链盘旋而成的 ;(2 )ＤＮＡ分子中的脱氧核糖和磷酸交替连结 ,排列在外侧 ,构成基本骨架 ,碱基排列在内侧 ;(3)两条链上的碱基通过氢键连结起来 ,形成碱基对。我处所用的ＤＮＡ结构模
DNA has a regular double-helix structure, the main features of which are: (1) DNA molecules are circling from two long, parallel, deoxynucleotide strands; (2) DNA and phosphoric acid alternate in DNA molecules. , arranged on the outside, constitute a basic skeleton, the bases are arranged inside; (3) the bases on the two strands are joined by hydrogen bonds to form base pairs. DNA structure model used in my office