A.neor基因的作用是鉴定与筛选含有正常PKU基因的胚胎干细胞 |
B.还需在重组载体中的HB1和HB2的上游和下游插入启动子和终止子 |
C.用图中重组载体转化时,可能会出现一些PKU基因错误整合的胚胎干细胞 |
D.需在含G418和DHPG的培养液中培养转化的胚胎干细胞,能够存活的即为正确整合的胚胎干细胞 |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2