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【单选题】
下列对原核生物mRNA的论述哪正确的：
A.
原核生物的一条mRNA链只能指导一条肽链的合成
B.
多顺反子mRNA在转录后加工中切割成单顺反子mRNA
C.
多顺反子mRNA翻译成一个大的蛋白质前体，在翻译后加工中裂解成若干成熟的蛋白质
D.
多顺反子mRNA上每个顺反子都有自己的起始和终止密码子，分别翻译成各自的产物
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