有关碱基互补配对原则的计算题解题规律总结如下。规律一:DNA双链中的两条互补链的碱基数相等,任意两个不互补的碱基之和恒等,占碱基总数的50%,即A+G-T+C=A+C=T+G=50%。例1一个DNA分子中的碱基(A+T)占70%,其转录成的信使RNA上的U占25%,则信使RNA上的碱基A占________。解析因为双链DNA上(A+T)占全部碱基的70%,根据碱基配对原则:A=T,C=G,所以DNA的每一条链上的该碱基和所占比例也是70%,根据转录时的碱基配对原 The principle of complementarity of base pairs of calculation problems Solving the rules are summarized as follows. The first law: DNA double strand in the two complementary strand of the same base number, any two non-complementary base and the same, accounting for 50% of the total number of base, that A + G-T + C = A + C = T + G = 50%. Example 1 A DNA molecule has 70% of the bases (A + T) in the DNA and 25% of the U transcribed into the messenger RNA, the base A on the messenger RNA accounts for ________. Resolution Because (A + T) on double-stranded DNA accounts for 70% of the total base, the bases and proportions on each strand of DNA are also 70% according to the principle of base pairing: A = T, C = G %, According to the original base pair when transcribed