A.分别用含35S和含32P的培养基培养细菌,再用此细菌培养出带相应标记的噬菌体 |
B.未标记的噬菌体在含32P标记的细菌体内复制三次,其子代噬菌体中含32P的个体占3/4 |
C.用含35S的培养基直接培养噬菌体,用以标记35S |
D.若32P标记组的上清液有放射性,则可能原因是搅拌不充分 |
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