A)450 B)350 C)334 D)434
Ishlanishi: 1) N=L/0,34 N=110,5/0,34=325 325*2=650
2) Eco.RI har bir kesgan joyda AATT orasidagi H bog’larni
uzadi. 2+2+2+2=10 A-T=2*4=8 ta
2 joydan kesilgan va ABC bo’laklarga bo’lingan: 8*2=16
3) 16---2%
x---100% x=(16*100)/2=800
4) 2A+3G=800
2A+2G=650
G=150 2A+3*150=800
2A=350
A=175 5) H=3G H=3*150=
450 Javob: A ____________________________
106. Ma`lum sharoitda 110,5 nm uzunlikdagi DNK malekulasi
Eco.RI restiriktaza fermenti ta`sirida ABC bo`lakka bo`lindi.Hosil
bo`lgan barcha DNK malekulasidagi vodorod bog`lar soni dastlabki
vodorod bog`lar sonidan 2% ga kam bo`lsa hosil bo`lgan DNK
malekulasidagi A-T orasidagi vodorod bog`lar sonini toping.
A)450 B)350
C)334 D)434
Ishlanishi: 1) N=L/0,34 N=110,5/0,34=325 325*2=650
2) Eco.RI har bir kesgan joyda AATT orasidagi H bog’larni
uzadi. 2+2+2+2=10 A-T=2*4=8 ta
2 joydan kesilgan va ABC bo’laklarga bo’lingan: 8*2=
16 3) 16---2%
x---100% x=(16*100)/2=800
4) 2A+3G=800
2A+2G=650
G=150 2A+3*150=800
2A=350
A=175 5) H=2A H=2*175=
350 350-16=334 Javob: C ____________________________
107. Ma`lum sharoitda 81,6 nm uzunlikdagi DNK malekulasi
BamHI restiriktaza fermenti ta`sirida ABCD bo`laklarga bo`lindi
Hosil bo`lgan barcha DNK malekulasidagi vodorod bog`lar soni
dastlabki vodorod bog`lar sonidan 5% ga kam bo`lsa dastlabki DNK
malekulasidagi G-S orasidagi vodorod bog`lar sonini toping.
A)360 B)240 C)228 D)342
Ishlanishi: 1) N=L/0,34 N=81,6/0,34=240 240*2=480
2) BamHI har bir kesgan joyda GATC orasidagi H bog’larni
uzadi. 3+2+2+3=10 G-S=2*3=6 ta A-T=2*2=4 ta
3 joydan kesilgan va ABCD bo’laklarga bo’lingan: 10*3=30
3) 30---5%
x---100% x=(30*100)/5=600
4) 2A+3G=600
2A+2G=480
