Javob: A ____________________________
96. i-RNK da U-25% va A-15% bo`lsa teskari transkripsiya
jarayonida hosil bo`lgan DNK qo`sh zanjiridagi A va T orasidagi
vodorod bog`lar sonini aniqlang.
A)80 B)100 C)88 D)96
Ishlanishi: 1) T=U+A T-A=25+15=40
2) 100-40=60 G-S=60
3) H=2A H=2*40=
80
Javob: A ____________________________
97. i-RNK da U-25% va A-15% bo`lsa teskari transkripsiya
jarayonida hosil bo`lgan DNK qo`sh zanjiridagi G va S orasidagi
vodorod bog`lar sonini aniqlang.
A)180 B)200 C)280 D)250
Ishlanishi: 1) T=U+A T-A=25+15=40
2) 100-40=60 G-S=60
3) H=3G H=3*60=
180
Javob: A ____________________________
98. i-RNK da U-25% va A-15% bo`lsa teskari transkripsiya
jarayonida hosil bo`lgan DNK qo`sh zanjirini uzunligini
aniqlang.(nukleotidlar orasidagi masofa 0,34nm)
A)34nm B)68nm C)54,4nm D)54nm
Ishlanishi: 1) T=U+A T-A=25+15=40
2) 100-40=60 G-S=60
3) DNK ning 1 ta ipidagi N lar topiladi :
40+60=100
4) L=N*0,34 L=100*0,34=
34
Javob: A ____________________________
99. i-RNK da U-25% va A-15% bo`lsa teskari transkripsiya
jarayonida hosil bo`lgan DNK qo`sh zanjiridagi fosfodiefir bog`lar
sonini aniqlang.
A)198 B)188 C)178 D)168
Ishlanishi: 1) T=U+A T-A=25+15=40
2) 100-40=60 G-S=60
3) DNK ning 1 ta ipidagi N lar topiladi :
40+60=100
4) 100*2=200 F=200-2=
198 Javob: A ____________________________
100. 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 G-S orasidagi vodorod bog`lar sonini toping.
