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科目: 來源:gzsw 題型:

3、利用含四環(huán)素基因的質粒將含有抗四環(huán)素基因的大腸桿菌改造成工程菌,生產鼠的β-珠蛋白,相關操作不合理的是       (    )

     A.利用反轉錄技術獲得β-珠蛋白基因

     B.用含抗四環(huán)素基因的質粒構建基因表達載體

     C.用Ca2+處理有四環(huán)素抗性的大腸桿菌使其變成感受態(tài)

     D.用含有四環(huán)素的培養(yǎng)基篩選導入重組質粒的工程菌

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科目: 來源:gzsw 題型:

2、下表關于基因工程中有關基因操作的名詞及對應的內容,正確的組合是                  (    )

 

供體

剪刀

針線

運載體

受體

A

質粒

限制性內切酶

DNA連接酶

提供目的基因的生物

大腸桿菌等

B

提供目的基因的生物

DNA連接酶

限制性內切酶

質粒

大腸桿菌等

C

提供目的基因的生物

限制性內切酶

DNA連接酶

質粒

大腸桿菌等

D

大腸桿菌等

DNA連接酶

限制性內切酶

提供目的基因的生物

質粒

試題詳情

科目: 來源:gzsw 題型:

1、(多選)一對等位基因經(jīng)某種限制性內切酶切割后形成的DNA片段長度存在差異,凝膠電泳分離酶切后的DNA片段,

與探針雜交后可顯示出不同的

帶譜。根據(jù)該特性,就能將它

作為標記定位在基因組的某一

位置上,F(xiàn)有一對夫婦生了四

個兒女,其中1號性狀特殊

(如右圖),由此可推知這四

個兒女的基因型(用D、d

表示)不正確的是(    )

     A.1號為XdXd                                                                     B.2號為XDY          

     C.3號為Dd                                     D.4號為DD

評卷人

得分

 

 

二、選擇題

 

(每空? 分,共? 分)

 

 

試題詳情

科目: 來源:gzsw 題型:

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科目: 來源:gzsw 題型:

38、(You may read the questions first)

Products: mail order

Bay 3-piece luggage set for only  £69.99                   ALL ORDERS           

Half price offer                                         DELIVERED                     

Pack with confidence, Travel in Style…. Arrive intact           DELOVERED              

This elegant luggage is manufactured in a new hard-wearing plastic FREE TO YOUR

 which is strong and very light in weight                        DOOR

·Light but hard-wearing

·3 locks (2 key and I combination lock )for total security

·Supplied with initials for personalization

MD 9572 £69.99

Plan your journey they easy way This portable Traveler will give you directions from A to B

anywhere in England, Scotland and Wales. Just enter the start and the end of your journey and the Traveler will work out the quickest route. The Traveler can also estimate the journey time. average speed and fuel consumption. Need to change your journey at any stage?The Traveler will give you a new set of directions. Other features include auto shut-off.And a built-in light for night-time use.

Powered by 4AA batteries (not supplied).

MD 7437 Traveler £69.99

How much do you know?

Everyone, young and old, enjoys and challenge of quizzers. Our electronic Quizmastercontains 5,400 questions and answers in 6 classifications-general knowledge, sport, science, geography, art and history. Each of these is further divided into 3 skill levels(easy, medium and difficult)so younger children can fairly compete against teenagers and adults. PLUS!

Every Quizmaster includes:

·8 Games of Hangman

·Portune Teller Games

·10-digit calculator

·long life cell batteries included

MD 9569 Quizmaster was £19.99 now £14.99

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

C. can be purchased in many shops     D. can be used by people of all

3 All these advertisements are aimed at those_________.

A. who like to order goods at home    B. who are going to travel abroad

C. who do market researches         D. who are interested in intelligence tests

 

 

試題詳情

科目: 來源:gzsw 題型:

36、Our English teacher had us all _______our names on a card.

A. written     B. to write        C. write            D. for writing

 

 

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科目: 來源:gzsw 題型:

35、They ______ be at home. You see, the door is locked from the outside.

A. can’t       B. may          C.  must           D.  mustn’t

試題詳情

科目: 來源:gzsw 題型:

34、The farmer who admitted ______ the tiger was severely punished.

A. to kill      B. killing        C. killed            D. to have killed

試題詳情

科目: 來源:gzsw 題型:

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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