A.活体转化实验中,R型菌转化成的S型菌不能稳定遗传 |
B.活体转化实验中,S型菌的荚膜物质使R型菌转化成有荚膜的S型菌 |
C.离体转化实验中,蛋白质也能使部分R型菌转化成S型菌且可实现稳定遗传 |
D.离体转化实验中,经DNA酶处理的S型菌提取物不能使R型菌转化成S型菌 |
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