B) 300 C) 900 D) 100
Ishlanishi: 1) N=M/300 N=90000/300=
300N -2 ta ipdagi N lar
Javob: B _____________________________ 221. DNK molekulasining og’irligi 90000 ga teng bo’lsa, shu
DNK dan sintezlangan oqsildagi peptid bog’lar sonini aniqlang.
(bitta nukleotid og’irligi 300 deb olinsin)
A) 99 B) 199 C) 149 D
) 49 Ishlanishi: 1) N=M/300 N=90000/300=300N -1 ta ipdagi N lar
2) 300N/2=
150N -1 ta ipdagi N lar
3) 150/3=50AK
4) 50-1=
49P Javob: D _____________________________ 222. DNK molekulasining og’irligi 90000 ga teng bo’lsa, shu
DNK dan sintezlangan oqsildagi aminokislota sonini aniqlang. (bitta
nukleotid og’irligi 300 deb olinsin)
A) 100 B) 200 C) 150
D) 50 Ishlanishi: 1) N=M/300 N=90000/300=300N -1 ta ipdagi N lar
2) 300N/2=
150N -1 ta ipdagi N lar
3) 150/3=
50AK Javob: D _____________________________ 223. Ma’lum bir DNK bo’lagidan 34 ta aminokislotaga ega oqsil
sintezlandi. Mutatsiya natijasida 3 ta aminokislota hosil bo’lmadi.
Ushbu oqsil sinteziga javobgar bo’lgan t-RNK sonini aniqlang.
A) 34
B) 31 C) 1 D) 2
Ishlanishi: 1) 34-3=31AK
2) 31 ta AK=
31 ta t-RNK
Javob: B _____________________________ 224. DNK zanjiridagi nukleotidlar orasidagi masofa 0,34 nm ga
teng va ular o'zaro fosfodiefir bog'lari orqali bog'lansa, 153 nm
uzunlikdagi DNK qo'sh zanjirida 12 juft nukleotid deletsiyaga
uchragan bo'lsa, avvalgi va mutatsiyaga uchragan DNK fragmenti
asosida transkripsiya bo'lgan i-RNKdagi nukleotidlar orasidagi
fosfodiefir bog'lar sonini aniqlang.
A) 450; 438 B) 450; 444
