2021-2022 英语周报 七年级 HZ 5答案

2.B解析:本题考查基因的表达。据题意可知,①②能与启动部位P结合,而RNA聚合酶可与启动部位结合,启动转录过程,并能催化DNA解开双螺旋,故①②表示DNA聚合酶,A项正确;图中DNA片段上显示了1个启动部位和3个基因的位置,因此可推测①②与启动部位结合,均可启动3个基因的转录,B项错误;根据原核细胞转录和翻译同时进行的特征,图中显示RNA右侧尚未转录完成,故可推测图中有3个核糖体同时在翻译,而且它们的移动方向是左→右,C项正确;图中3条多肽代表了图中3个基因的表达过程,故合成结束后,它们的氨基酸序列不同,D项正确。

第:节长長达(满分25分) Possible versionDate: March 21.2021The annual translation competition on Chinese poetry is going to be held online trom March 2& to 30 byschools English Chub. Any student who would like to participate needs to email the translation totranlslation-202lyahoo.com,andattachano-longer-than-3-minutevideoofpertormingthetranslationinspecially designed scene related to the poem. Then based on ten professional judges decision, there will be afirst-prize winner, two second-prize and five third-prize. The awards are more than wonderful and appealing, suchas Kindles and gil cards of Xinhua BookstoreAll of you, including the overseas students, are welcome to join in the activity. Not only can the experiencehelp you to gain a deeper understanding of Chinese culture and history, but it also gives you an opportunity to showhow well you master both Chinese and English. So what are you waiting for? Just begin your translationThe english Club

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