問題詳情

24. In eukaryotic cells, transcription cannot begin until _______
(A)the DNA introns are removed from the template.
(B)the two DNA strands have completely separated and exposed the promoter.
(C)several transcription factors have bound to the promoter.
(D)the 5’ caps are removed from the mRNA.
(E)the mitosis of cell division

參考答案

答案：C
難度：計算中-1
書單：沒有書單，新增

用户評論

【用戶】各選項詳解

【年級】小五下

【評論內容】24. In eukaryotic cells, transcription cannot begin until _______(A)the DNA introns are removed from the template.(B)the two DNA strands have completely separated and exposed the promoter.(C)several transcription factors have bound to the promoter.(D)the 5’ caps are removed from the mRNA.(E)the mitosis of cell division在真核細胞中，轉錄直到以下情況才能開始：(C) 幾個轉錄因子已與啟動子結合。轉錄因子是必需的調節蛋白，在 RNA 聚合酶啟動轉錄之前必須與基因的啟動子區域結合。這些轉錄因子有助於將RNA聚合酶募集至啟動子，促進DNA雙螺旋的解旋，並協助轉錄起始復合物的形成。一旦轉錄因子與啟動子結合，RNA聚合酶就可以開始合成RNA轉錄本。

【用戶】各選項詳解

【年級】小五下

【評論內容】24. In eukaryotic cells, transcription cannot begin until _______(A)the DNA introns are removed from the template.(B)the two DNA strands have completely separated and exposed the promoter.(C)several transcription factors have bound to the promoter.(D)the 5’ caps are removed from the mRNA.(E)the mitosis of cell division在真核細胞中，轉錄直到以下情況才能開始：(C) 幾個轉錄因子已與啟動子結合。轉錄因子是必需的調節蛋白，在 RNA 聚合酶啟動轉錄之前必須與基因的啟動子區域結合。這些轉錄因子有助於將RNA聚合酶募集至啟動子，促進DNA雙螺旋的解旋，並協助轉錄起始復合物的形成。一旦轉錄因子與啟動子結合，RNA聚合酶就可以開始合成RNA轉錄本。