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32.In our class there are 60 students, of ____________ two thirds are boys.

A. which    B. them    C. whom      D. who  

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31.Mary wrote books to earn money while John gained his wealth _________ selling Mary’s works.

A. on     B. by     C. in     D. through

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30.I hated it when people don’t ___________ their promises.

A. carry out    B. look out     C. run out     D. find out

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29.________ hard he tried, he could not change his wife’s mind.

A. However    B. Whatever     C. As     D. No matter what

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28.------I don’t know why he has made such a silly mistake in the exam.

  ------ He ____________ it before he handed in the paper.

A. may have checked     B. might check

C. must have checked    D. should have checked

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26.When she finished her story, none of us said anything about it, which made her feel rather ________.

A. embarrassing    B. embarrassed     C. embarrass    D. embarrassment

27 Read the passage a second time, ___________ the meaning won’t become clearer to you.

A. and     B. so     C. or     D. but

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25.E-mail, as well as phone calls, _____________ an important part in daily communication.

A. are playing    B. is playing    C. have played    D. has played

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第一节:单项填空(共15 小题;每小题1分,满分15分)

    从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。

21 ------ He runs his own company at the age of 21.

 ------- ___________________

A. Good luck!       B. That’s quite something  

C. Congratulations!      D. It’s hard to say.

22 ------ How did you find _________ long talk given by the headmaster on ___________ Teachers’ Day?

  -------- Boring. I’d rather he had made it short.

A. a ; the     B. the ;  /     C. a ;  /     D. the ; the

23 ------- How can we __________ to a changeable environment?

-------- By constant study and changing our ideas.

A. adopt    B. adapt      C. add      D. admit

24.If we don’t take steps, some rare animals, such as the Tibetan antelopes and pandas will ____________ some day just as dinosaur.

A. die out   B. die away    C. die down    D. die off

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35.(13分)根据细胞中遗传物质的复制和表达的过程,结合所给图示一至五,回答下列问题。

(1)图一所示全过程叫        

(2)看图回答:

 
图二
图三
图四
生理过程
 
 
 
模   板
 
 
 

(3)能完成图一中③④的生物是__________________。

(4)图五是_________________,在生物细胞中共有____________种。

(5)基因中                代表遗传信息,基因可通过控制      

          进而控制生物体的性状,还能通过控制        直接控制生物体的性状。

 

()

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33.(6分)下图为某家族白化病的遗传系谱图,该病的致病基因位于常染色体上(等位基因用 B 和 b 表示),请分析回答:

(1)9号个体基因型是       ,该病的遗传过程遵循        定律。

(2)在第Ⅲ代个体中,可能不带致病基因的是    (   )

A.10      B. 9        C.8        D. 11

(3)Ⅱ代4号个体基因型是BB的概率是         

(4)该图能否是红绿色盲病的系谱图?为什么?                

                                    。(2分)

34(每空2分,共8分).浙江农科院陈锦江教授发现了油菜产油机制,光合作用产生磷酸烯醇式丙酮酸(PEP)运向种子有两条转变途径,如图所示。并根据这一原理培育出高油油菜,产率由原来的35%提高到58%。

(1)你认为提高油产量的基本思路是                      

                                     

(2)图二是控制PEPcasc 酶Ⅱ合成的基因,其中a链是转录链,陈教授及助手诱导该基因的b链也能转录,从而转录出双链mRNA,试问:

①PEPcasc 酶Ⅱ和PEPcasc 酶Ⅰ的本质区别是                    

                                       

②转录出的双链mRNA与图二基因的区别是                    

                                     

③为什么该基因转录出双链mRNA就能提高油菜产量                    

                                       

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