Application of the cis-trans test defines the genetic unit of function, the cistron.

顺?反测验可以用来确定遗传的功能单位―顺反子。

All of the genes necessary for the lytic cycle are expressed in polycistronic transcripts from three promoters.

编码噬菌体结构成分的排列为。裂解周所要的以三个启动子起以多顺反子转录的形式表达。

Like eukaryotes, but unlike bacteria, they have introns in their transfer RNA, but like bacteria they have polycistronic operons (gene regulators).

像真核生物而不像细菌，转运RNA中含有内含子，还有细菌不具备的多顺反子的操纵子（的调控子）。