论文部分内容阅读
在DNA分子各种碱基的数量关系计算中 ,有这样一道题 :从某生物组织中提取DNA进行分析 ,其 4种碱基数的比例是鸟嘌呤与胞嘧啶之和占全部碱基数的4 6 %。又知该DNA的一条链 (H链 )所占的碱基中2 8%是腺嘌呤 ,问与H链相对应的另一条链 (L链 )中腺嘌呤占该链全部碱基数的 ( )A
In the calculation of the relationship between the number of various bases in DNA molecules, there is such a question: The extraction of DNA from a biological tissue for analysis, the ratio of the four kinds of bases is the sum of guanine and cytosine in the total number of bases 4 6 %. It is also known that 28% of the bases of one strand (H chain) of the DNA are adenine, and the adenine in the other strand (L chain) corresponding to the H chain is the total number of bases in the strand ( )A