近年来,随着生命科学的飞跃发展,生物自身的增殖及其生存机构,已达到可以在分子水平上予以解释的地步。遗传基因学或遗传基因操作一词,已成为广泛应用的述语,同时遗传基因本质的DNA 更加引人注目而登上历史舞台,晚近相继证实另一类型核酸 RNA,不仅支持了 DNA 的复制和机能的再现,而且还具有其他多种活动机能、类病毒(Viroid)就是在这种情况下被发现,并逐渐取 In recent years, with the rapid development of life sciences, the proliferation of living organisms and their living organisms have reached the point where they can be explained at the molecular level. The term genetics or genetic manipulation has become a widely used term, and at the same time, DNA of the nature of the gene is all the more noticeable on the stage of history. Recently, another type of nucleic acid RNA has been confirmed one after another, not only supporting DNA replication and Function reproduction, but also has a variety of other functions, Viroid is found in this case, and gradually