科目: 来源:gzsw 题型:
3、利用含四环素基因的质粒将含有抗四环素基因的大肠杆菌改造成工程菌,生产鼠的β-珠蛋白,相关操作不合理的是 ( )
A.利用反转录技术获得β-珠蛋白基因
B.用含抗四环素基因的质粒构建基因表达载体
C.用Ca2+处理有四环素抗性的大肠杆菌使其变成感受态
D.用含有四环素的培养基筛选导入重组质粒的工程菌
科目: 来源:gzsw 题型:
2、下表关于基因工程中有关基因操作的名词及对应的内容,正确的组合是 ( )
|
|
供体 |
剪刀 |
针线 |
运载体 |
受体 |
|
A |
质粒 |
限制性内切酶 |
DNA连接酶 |
提供目的基因的生物 |
大肠杆菌等 |
|
B |
提供目的基因的生物 |
DNA连接酶 |
限制性内切酶 |
质粒 |
大肠杆菌等 |
|
C |
提供目的基因的生物 |
限制性内切酶 |
DNA连接酶 |
质粒 |
大肠杆菌等 |
|
D |
大肠杆菌等 |
DNA连接酶 |
限制性内切酶 |
提供目的基因的生物 |
质粒 |
科目: 来源:gzsw 题型:
1、(多选)一对等位基因经某种限制性内切酶切割后形成的DNA片段长度存在差异,凝胶电泳分离酶切后的DNA片段,
与探针杂交后可显示出不同的
带谱。根据该特性,就能将它
作为标记定位在基因组的某一
位置上。现有一对夫妇生了四
个儿女,其中1号性状特殊
(如右图),由此可推知这四
个儿女的基因型(用D、d
表示)不正确的是( )
A.1号为XdXd B.2号为XDY
C.3号为Dd D.4号为DD
|
评卷人 |
得分 |
|
|
|
二、选择题
(每空? 分,共? 分)
科目: 来源:gzsw 题型:
38、(You may read the questions first)
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1 In advertisement 2, the Traveler enables us to learn__________.
A. the road conditions from London to Oxfords
B. all the garages along the chosen route
C. the time and speed of the journey in Britain
D. the directions from London to Paris.
2 In advertisement 3, the Quizmaster_________.
A. contains nothing but 5400 questions B. can only answer challenging questions
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C. who do market researches D. who are interested in intelligence tests
科目: 来源:gzsw 题型:
36、Our English teacher had us all _______our names on a card.
A. written B. to write C. write D. for writing
科目: 来源:gzsw 题型:
35、They ______ be at home. You see, the door is locked from the outside.
A. can’t B. may C. must D. mustn’t
科目: 来源:gzsw 题型:
34、The farmer who admitted ______ the tiger was severely punished.
A. to kill B. killing C. killed D. to have killed
科目: 来源:gzsw 题型:
33、So often ______ in recent years that it has almost become a rule.
A. has this happened B. this has happened
C. is this happening D. for this to happen
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