Strands of genetic material - DNA and RNA - are sequences of small units called nucleotides.
基因资料—dna和rna—链是称为核苷酸的小单元组成的序列。
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Instead, the naked viral RNA may alter the function of the cells through a mechanism similar to RNA interference, in which the presence of certain RNAsequences can turn genes on and off.
More recently Gerald Joyce at Scripps has reported experiments in which two RNAsequences form collectively autocatalytic sets, each catalyzing the ligation of fragments that form the other.