A.提取矮牵牛蓝色花的mRNA,经逆转录获得互补的DNA,再扩增基因B |
B.利用限制性核酸内切酶从开蓝色花矮牵牛的基因文库中获取基因B |
C.利用DNA聚合酶将基因B与质粒连接后导入玫瑰细胞 |
D.将基因B直接导入大肠杆菌,然后感染并转入玫瑰细胞 |
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