44 G-S=(11+45)=
56 4) H=3G H=3*56=
168 Javob: B ____________________________
91. i-RNK da U-19%, S-11% va A-25% bo`lsa teskari
transkripsiya jarayonida hosil bo`lgan DNK qo`sh zanjiridagi A va T
lar orasidagi vodorod bog`lar sonini aniqlang.
A)78 B)108
C) 88 D)98
Ishlanishi: 1) G=100-(U+S+A)=45%
2) DNK ning 1 ta ipidagi N larni topamiz: N= U+S+A+G
DNK dagi S ni topish: i-RNK dagi T=(G+S)/2
N=(U)19+(S)11+(A)25+(G)45=100
3) A-
T=(19+25)=
44 G-S=(11+45)=
56 4) H=2A H=2*44=
88 Javob: C ____________________________
92. i-RNK da U-19%, S-11% va A-25% bo`lsa teskari
transkripsiya jarayonida hosil bo`lgan DNK qo`sh zanjirini
uzunligini aniqlang.(nukleotidlar orasidagi masofa 0,34nm)
A)51nm
B)34nm C)68nm D)54,4nm
Ishlanishi: 1) U-19%, S-11%, A-25%, G-? G=100-(U+S+A)=45%
2) DNK ning 1 ta ipidagi N larni topamiz: N= U+S+A+G
N=19+11+25+45=100
3) L=N*0,34 L=100*0,34=
34nm Javob: B ____________________________
93.i-RNK da U-25% va A-15% bo`lsa teskari transkripsiya
jarayonida hosil bo`lgan DNK qo`sh zanjiridagi T-% miqdorini
aniqlang.
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.
