题目

有关基因和酶的说法正确的是（  ） A.每个基因都控制合成一种酶 B.酶的遗传信息密码在内含子的碱基序列中 C.基因的复制、表达都需要酶 D.同一生物体不同细胞的基因和酶是相同的   答案：C特定的酶的产生是由一个特定的基因负责的，其他所有的蛋白质也都是由基因控制合成的，而且组成复杂蛋白质的肽链是由不同的基因决定的；酶的遗传信息密码在外显子的碱基序列中；同一生物体不同细胞的核基因是相同的，但酶是不同的；基因的复制、表达都需要酶是正确的。  阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。People will do anything to see a free show, even 1. it is a bad one．When the news got round that a comedy show would 2.(give) at our local cinema by the P．and U．Bird Seed Company, we all rushed to see it．We had to queue for hours to get in and there must have been several hundred people present just before the show began．3.(lucky), the show was one of 4.(boring) we have ever seen．Those who failed to get in need not have felt _5.(disappoint), as many of the artists who should 6.(appear) did not come．The only funny thing we heard that evening came from the advertiser at the beginning of the program．He was obviously very nervous and for some minutes stood awkwardly before the microphone．As soon 7. he opened his mouth, everyone burst out 8.(laugh)．We all know9.the poor man should have said, but what he actually said was: 'This is the Poo and Ee Seed Bird Company．Good ladies, evening and 10.(gentleman)!"