分子生物学双语课堂作业和答案.doc

2012212175-杨雪琴 请将以下题目和选择翻译成中文，并给出正确答案 1 Which one of the following statements about eukaryotic RNA polymerases I, II and III is false ? A RNA poly II is very sensitive to α-amanitin. B RNA poly II is located in the nucleoplasm. C RNA poly III transcribes the genes for tRNA. D eukaryotic cells contain other RNA polymerases in addition to RNA Pol I, RNA Pol II and RNA Pol III. E each RNA polymerase contains subunits with homology to subunits of the E. coli RNA polymerase as well as additional subunits, which are unique to each polymerase F the carboxyl end of RNA Pol II contains a short sequence of only seven amino acids which is called the carboxyl-terminal domain (CTD) and which may be phosphorylated. 1、下面关于真核生物的RNA聚合酶I, II 和III的说法哪一个是错误的? F A、RNA聚合酶II对α-鹅膏覃碱II位于核质 C、RNA聚合酶III负责tRNA的基因转录 D、真核细胞除了RNA聚合酶I、RNA聚合酶II、RNA聚合酶III外还含有其他的RNA聚合酶 E、每种RNA聚合酶都包含有和大肠杆菌RNA聚合酶同源的亚基，还有每种RNA聚合酶独一无二的另外的一些亚基 F、RNA聚合酶II的羧基端含有一段小的只有7个氨基酸的序列，叫做羧基末端域（CDT） 2 Which two of the following statements about RNA Pol I genes are true? A RNA Pol I transcribes the genes for ribosomal RNAs. B human cells contain 40 clusters of five copies of the rRNA gene. C the 18S, 5.8S and 28S rRNAs are synthesized as separate transcripts. D RNA Pol I transcription occurs in the nucleoplasm. E RNA Pol I transcription occurs in the cytoplasm. F rRNA gene clusters are known as nucleolar organizer regions. 2、下面关于RNA聚合酶I的说法，哪两个是正确的？A、F A、RNA聚合酶I为核糖体RNA转录基因 B、人类的细胞包含40簇的rRNA的基因，每一簇是5个拷贝[→应该是5簇，每簇40个拷贝] C、18S, 5.8S 和 28S rRNAs是单独转录合成的[→应该是连续合成] D、RNA聚合酶I的转录发生在核质中[→应该是发生在核仁中] E、RNA聚合酶I的转录发生在细胞质中[→应该是发生在核仁中] F、rRNA基因簇被叫做核仁组织区 3 Which one of the following statements about RNA Pol I transcription is false ? A in RNA Pol I promoters, the core element is 1000 bases downstream from the upstream control element (UCE). B upstream binding factor (UBF) binds to both the UCE and the upstream part of the core element of the RNA Pol I promoter. C seletivity factor SL1 stabilizes the UBF-DNA complex. D SL1 contains