x---100% x=(30*100)/5=600
4) 2A+3G=600
2A+2G=480
G=120
2A+3*120=600
2A=240
A=120
5) H=2A H=2*120=
240
Javob: A
____________________________
109. 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 hosil bo`lgan
barcha DNK malekulasidagi A-T orasidagi vodorod bog`lar
sonini
toping.
A)240
B)228 C)360
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
G=120
2A+3*120=600
2A=240
A=120
5) H=2A H=2*120=240
240-12=
228 Javob: B
____________________________
110. 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 hosil bo`lgan
barcha DNK malekulasidagi G-S orasidagi vodorod bog`lar sonini
toping.
A)240 B)228 C)360
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
Dostları ilə paylaş: