Dna molecular biology technique is a method occurring recently to encode information by simulating the double helix structure of dna and the watson - crick complementary condition Dna分子生物技术，这是一个最新发展起来的以模拟分子生物dna的双螺旋结构和碱基互补配对规律进行信息编码的方法和技术。
2.
The building block of all lifeforms on earth is the deoxyribonucleic acid . it has the shape of a double helix in which two polynucleotide chains are coiled about each other in a spiral 而组成地球上所有生命的基本单位去氧核糖核酸dna的双螺旋结构也是非对称地存在的，原来自然界中的去氧核糖核酸绝大部分都是右旋的。
