英语周报高一课标版2022-2022第12期答案

38.(15分,除标注外,每空2分)(1)剪碎,用胰蛋白酶或胶原蛋白酶处理一段时间(2)无菌无毒环境、适宜的温度和pH、必需的营养适宜的气体环境等防止细胞代谢产物积累影响动物细胞的生长和增殖(答案合理即可)维持培养液的pH(3)(已免疫的)B淋巴细胞和骨髓瘤细胞聚乙二醇(PEG)既能无限增殖,又能分泌所需抗体(4)显微注射(1分)【解析】(1)在进行动物细胞培养时,首先要将新鲜取材的动物组织剪碎,用胰蛋白酶或胶原蛋白酶处理一段时间,以分散成单个细胞,制成细胞悬液(2)动物细胞培养时,为达到无菌、无毒的环境条件,除了要对培养液和培养器具进行灭菌处理以及在无菌环境下进行操作外,另外还应定期更换培养液,以便清除代谢产物,防止细胞代谢产物积累对细胞自身造成危害。气体环境中CO2的作用是维持培养液的pH。(3)在单克隆抗体的制备过程中,与骨髓瘤细胞融合的是已经免疫的B淋巴细胞。在细胞融合的过程中,常用的化学诱导剂是聚乙二醇(PEG);筛选出的杂交瘤细胞所具有的特点是可在体外条件下无限增殖,又能分泌所需抗体(4)将培养的供体细胞导入受体细胞需用到显微注射技术。

书面表达One possible version:Dear PeterI'm writing to invite you to attend a lecture about exercise and health in our schoolAs you know, there are many students who are overweight or short-sighted in our school. They devote all their energy to studying andignore exercise. As a result, they are not so strong and healthy as they should be. Besides, some girls choose to keep slim by controlling thdiet, which also affects their health. So we hope to promote some health knowledge through this lecture: The lecture, which is to be held in theschool hall next Friday afternoon, will last from 3: 00 pm to 5: 00 pm. I hope you can attend it and share something with us.ooking forward to receiving your early replyYours sincerely

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