A.β链中腺嘌呤与胸腺嘧啶的数量之和占该链碱基总数的44% |
B.β链中鸟嘌呤与胞嘧啶所占的比例相等,均是28% |
C.α链中胸腺嘧啶所占的比例是16%,占双链DNA分子的8% |
D.α链中(G+C)/(A+T)=14/11,β链中(A+T)/(G+C)=11/14 |
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