1.易错点辨析(1)病毒在生物学中的应用举例:1基因工程中作载体,2动物细胞工程中作诱融合剂,3在免疫学上可作疫苗用于免疫预防.(2)标记基因(通常选抗性基因)的作用是:用于检测重组质粒是否被导入受体细胞(不含抗性);而选择性培养基(加抗生素的培养基)的作用是:筛选是否导入目的基因的受体细胞.抗生素针对的不是目的基因,而是淘汰不具有抗性的没有导入目的基因的受体细胞. 1 easy to misdirect point analysis (1) the application of the virus in biology for example: 1 genetic engineering as a carrier, 2 animal cell engineering as luring fusion agent, 3 immunologically can be used for vaccine immunization. (2 ) Marker gene (usually a selectable resistance gene) serves to: detect whether the recombinant plasmid is introduced into recipient cells (without resistance); and selective medium (antibiotic-supplemented medium) has the effect of screening Instead of the target gene, the antibiotic is introduced into the recipient cell of the gene of interest, but the non-resistant recipient cell that has not been introduced with the gene of interest is eliminated.