Dnk-testlar 270 ta masalani ishlanishi

Ishlanishi:

1) N=L/0,34 N=105,4/0,34=310 310*2=620
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---3,75%
x---100% x=(30*100)/3,75=800 4) 2A+3G=800
2A+2G=620

G=180

2A+3*180=800
2A=360

A=130

5) H=3G H=3*180=540 Javob: A

94. 
    Ma`lum sharoitda 105,4 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 3,75% ga kam bo`lsa dastlabki DNK malekulasidagi A-T orasidagi vodorod bog`lar sonini toping.
    

A)260 B)248 C)522 D)540

Ishlanishi:

1) N=L/0,34 N=105,4/0,34=310 310*2=620
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---3,75%
x---100% x=(30*100)/3,75=800 4) 2A+3G=800
2A+2G=620

G=180

2A+3*180=800
2A=360

A=130

5) H=2A H=2*130=260 Javob: A

94. 
    Ma`lum sharoitda 105,4 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 3,75% ga kam bo`lsa hosil
    

bo`lgan barcha DNK malekulasidagi A-T orasidagi vodorod bog`lar sonini toping.
A)260 B)248 C)522 D)540

Ishlanishi:

1) N=L/0,34 N=105,4/0,34=310 310*2=620
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---3,75%
x---100% x=(30*100)/3,75=800 4) 2A+3G=800
2A+2G=620