32. 7-methylguanosine is added to the 5' end of almost all eukaryotic mRNAs in 5',5'-triphosphate linkage
(A) at transcription initiation
(B) at transcription elongation
(C) after transcription
(D) none of above
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題目解析 題目詢問的是7-甲基鳥苷(7-...