l = 34*105 Å => N = 34*105*2/3,4 = 2*106 (nu)
M = N*300 = 2*106 *300 = 6*108 (đvC)
A + G = 50%A = 20% = 20%* 2*106 = 4*105 nu = TG = 30% = 30%*2*106 = 6*105 nu = XH = 2A + 3G = 2*4*105 + 3*6*105 = 2,6*106 (lk)
n=(34*10^5):3.4*2=2*10^6
A=30%*(2*10^6)=6*10^5
SUY RA: G= ((2*10^6)-2*A)\2=4*10^5
M=2*10^6*300
H= 2A+3G