已知信使RNA有碱基300个,那么转录此RNA的基因中,胞嘧啶和腺嘌呤的总数是150个"转录次RNA" 是"此RNA" 吧由查加夫定则知道:DNA中A=T,G=C那么C+A = T+G = 1/2(A+T+C+G) = 1/2DNA中碱基数 = 1/2 ×300个 = 150个懂了吗?...