a) Mạch còn lại : T-A-X-G-A-T-T-A-X-G
b) Theo NTBS :
-> A = T = 2000 x 25% = 500 (N)
-> G = X = \(\dfrac{2000-500x2}{2}=500\) (N)
\(\left[{}\begin{matrix}1:-A-T-G-X-T-A-A-T-G-X-\\2:-T-A-X-G-A-T-T-A-X-G-\end{matrix}\right.\)
a)T-A-X-G-A-T-T-A-X-G
b)Ta có:A=T=2000.25%=500 (nu)
N=A+T+G+X
=>G=X=(2000-500.2):2=500(nu)