单项选择题

DNA上某段碱基顺序为:5'-AGCTAACGT-3,转录后的mRNA相应的碱基顺序为

A.5'-UCGAUUGCT-3'
B.5'-ACGUUAGCU-3'
C.5'-TCGATTGCA-3'
D.5'-AGCTAACGT-3'
E.5'-UCGAUUGCA-3'
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