2022届2022年辽宁名校联盟·调研卷(三)3语文答案

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22.(12分,除标注外,每空2分)(1)翻译(1分)起始密码子氨基酸(1分)(2)UCU、GAA(3)基因通过控制蛋白质的结构直接控制生物体的性状(4)等位基因一个mRNA分子上可结合多价核糖体,合成多条相同的肽链【解析】(1)据图可以判断过程①是转录,过程②是翻译,物质a是DNA,物质b是mRNA,翻译过程从核糖体读取起始密码子开始,并需要氨基酸作为原料。(2)根据携带丝氨酸和谷氨酸的tRNA上的反密码子分别为AGA、CUU,可以推知丝氨酸和谷氨酸的密码子分别为UCU、GAA。3)据图可以看出基因可通过控制蛋白质的结构直接控制生物体的性状(4)致病基因与正常基因是一对等位基因。在细胞中由少量b就可以短时间内合成大量的蛋白质,其主要原因是一个mRNA分子上可结合多个核糖体,合成多条相同的肽链。

第三节One possible versionParagraph 1As the cashier put the DVD into a plastic bag, / walkeder to the younger woman. "Is that your mom? "I askedhalfway expecting her to tell me it was none of my businessBut she rolled her eyes and said, "Yeah. "I smiled toshow her I wasn't criticizing.Cherish her, "I said. Andn I answered her curious expression by saying, "Whenshes gone, it's the little moments like this that'llcomeack to you. " It was true. I missed my mother still andremembered the moments when I was so impatient as tomake her life miserableParagraph 2The elderly woman moved with her deliberate slownessback to her daughter. Together they made their way towardsthe exit of the video store. They stood there for a momentside bywaiting for the rushing holiday current and foin it. Then the daughter glanced over andmomentarily regarded her mother. And slowly, almostreluctantly, she placed her arm with apparently unaccus.tomed affection around her mother's shoulders and gentlguided her back into the deluge.