[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$focRp1IsvCTjMIJwRy5KBUJZR4vEdjtaXk0VlVXFKpeU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":17,"related":18,"source":29,"type":30},[],"2024-11-02 19:04:44",164209828,[8,9],"上清液","沉淀",{"count":11,"courseId":12,"courseImg":13,"courseName":14,"workId":15,"workName":16},15,"699efe48c472300dc848a5e08fc14cab","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4d2503e65bc3b5873ae7b2e6ca48163e.jpg","分子生物学技术实验","548571d73c7945289e2d52daece0dacb","质粒DNA提取及分析","质粒DNA提取时,加入无水乙醇静置一段时间后离心,液体会分层,我们应该保留",[19,31,40,49,58,67,72,81,88,97],{"answer":20,"createTime":21,"id":22,"options":23,"question":28,"source":29,"type":30},[],"2024-11-02 19:04:43",164209819,[24,25,26,27],"RPMI-1640","LB","DMEM","MEM","对大肠杆菌进行培养时,请选择合适的培养基","v1",0,{"answer":32,"createTime":5,"id":33,"options":34,"question":39,"source":29,"type":30},[],164209820,[35,36,37,38],"杀死可能存在的杂菌,促进目的菌株的生长","平衡培养基的pH","作为细菌代谢生长的必须组分","中和代谢过程中产生的有毒物质","LB 培养基中加入氨苄青霉素的作用是",{"answer":41,"createTime":5,"id":42,"options":43,"question":48,"source":29,"type":30},[],164209821,[44,45,46,47],"葡萄糖可使细菌充分重悬,不会快速沉降","Tris-HCl可以维持整个反应的pH值","EDTA可以抑制DNA酶的活性","加入溶液I后,菌体发生裂解","下列关于溶液I的说法,错误的是",{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":29,"type":30},[],164209822,[53,54,55,56],"平衡溶液酸碱度","使溶液呈中性","提供碱性环境,裂解细菌","提供高离子盐浓度","溶液 II 中的主要成分是 NaOH 和 SDS,该溶液的作用是",{"answer":59,"createTime":5,"id":60,"options":61,"question":66,"source":29,"type":30},[],164209823,[62,63,64,65],"中和溶液pH","使质粒复性","降解RNA","使染色质及绝大部分蛋白质、细胞碎片交联沉淀","以下不属于溶液III的作用的是",{"answer":68,"createTime":5,"id":69,"options":70,"question":71,"source":29,"type":30},[],164209824,[9,8],"溶液III作用完后需要离心处理,处理后应保留",{"answer":73,"createTime":5,"id":74,"options":75,"question":80,"source":29,"type":30},[],164209825,[76,77,78,79],"去除残留的RNA","去除残留的基因组DNA","去除残余的盐离子","去除残余的蛋白质及细胞碎片","质粒DNA提取时,在上清液中加入酚氯仿试剂的作用是",{"answer":82,"createTime":5,"id":83,"options":84,"question":87,"source":29,"type":30},[],164209826,[8,85,86],"中间相","下层液体","质粒DNA提取时,加入酚氯仿试剂混匀离心后,液体会分层,我们需要保留",{"answer":89,"createTime":5,"id":90,"options":91,"question":96,"source":29,"type":30},[],164209827,[92,93,94,95],"沉淀蛋白质","沉淀RNA","沉淀质粒DNA","降解杂质分子","质粒DNA提取时,向上清液中加入无水乙醇的作用是",{"answer":98,"createTime":5,"id":6,"options":99,"question":17,"source":29,"type":30},[],[8,9]]