摘要:RNA是一些病毒的遗传物质,能复制和突变;RNA是DNA与蛋白质之间的桥梁,具有编码、翻译和拓展遗传信息的功能;RNA逆转录产生cDNA,在基因组形成中起关键作用。RNA具催化活性,可v7,催化mRNA的剪接,DNA和RNA的水解、连接,RNA聚合,RNA的磷酸化等多种生化过程;某些微小RNA的时序表达,在个体发育中有重要调节作用:由双链RNA介导的转录后基因沉默对生物体抵御外来遗传元件RNA有重要作用。
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