A)20% B)26% C)40% D)15%
Ishlanishi: 1) DNK dagi T ni topish: i-RNK dagi T=(U+A)/2
T=(25%+15%)/2=20% Javob: A ____________________________
94. i-RNK da U-25%, G-30% va A-15% bo`lsa teskari
transkripsiya jarayonida hosil bo`lgan DNK qo`sh zanjiridagi S-%
miqdorini aniqlang.
A)20% B)30% C)40% D)15%
Ishlanishi: 1) U-25%, G-30%, A-15%, S-? S=100-(U+G+A)=30%
2) S=(G+S)/2 S=(30+30)/2=30% Javob: B ____________________________
95. i-RNK da U-25% va A-15% bo`lsa teskari transkripsiya
jarayonida hosil bo`lgan DNK qo`sh zanjiridagi vodorod bog`lar
sonini aniqlang.
A)260 B)300 C)280 D)350
Ishlanishi: 1) T=U+A T-A=25+15=40
2) 100-40=60 G-S=60
3) H=2A+3G H=(2*40)+(3*60)=80+180=260 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.
