题目内容

The following paragraphs are taken from the text, followed by a list of words or expressions. Choose the one that best completes each of the sentences."We must draw lots," the mayor said 1 . "It is the only fair thing." He sat with his hands still 2 his stomach, 3 his watch, but all through the cell you could hear its 4 tick tock tick. He added, " 5 the unmarried. The married should not be 6 . They have 7 ..." Chavel was 8 with a huge and shameful joy. It seemed to him that al- ready he was 9 —twenty-nine men to draw and only two marked papers 10 The chances had suddenly grown in his 11 from ten to one 12 —fourteen to one: the greengrocer had drawn a slip and 13 carelessly and without pleasure that he was 14 They watched him 15 astonishment but without 16 . He was a 17 . They didn’t judge him 18 their 19 standards, he belonged to an 20 class and they didn’t at first even attach the idea of 21 to his actions. A. pressed over B. enmity C. cowardice D. blunt E. filled F. to G. by H. hiding I. left J. favor K. firmly L. On M. with N. own O. included P. gentleman Q. unaccountable R. responsibilities S. indicated T. safe U. saved

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5"-ATCGTACGGCTA-3"为一结构基因的有意义链,其转录产物为

A. 5"-TAGCCTACGAT-3"
B. 5"-TAGCATGCCGAT-3"
C. 5"-UAGCCGUACGAU-3"
D. 5"-ALJCGUACGGCUA-3"

下列关于DNA转录的叙述正确的是

A. 因两条DNA链互补,所以以两条链为模板时转录生成的mRNA是相同的
B. 一条含有一个结构基因的DNA可转录两个mR-NA
C. 真核细胞中有些结构基因是不连续的,因此有些基因顺序并不表达在相应的mRNA中
D. 从特异基因转录生成RNA,其顺序可全部或部分被翻译出来

脊髓突然横断后,断面以下脊髓所支配的骨骼肌的紧张度( )。

A. 暂时性增强
B. 不变
C. 暂时性减弱甚至消失
D. 永久性消失
E. 永久性增强

下列对真核生物转录因子的叙述中正确的是

A. 直接或间接结合RNA-pol的反式作用因子
B. 相应于RNA-polⅡ的转录因子称为TFⅡ
C. 具有辨认和结合TATA盒的转录因子为TFⅡD
D. TFⅡ与原核生物σ因子的氨基酸序列完全一致

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