_____________________________ 173. 4ta nomalum nukleotidli DNK molekulalarining biridan
su`niy
sharoitda
99ta
peptid
bog`li
oqsil
molekulasi
sintezlandi.Barcha DNK molekulasidagi nukleotidlar oqsil
biosinteziga javob bo`lgan DNK molekulasidan 4,3 marta ko`p. 2-
DNK nukleotidi 1-DNK nukleotidlaridan 1,2 marta, 3-DNK dan 0,8
marta, 4-DNK nukleotidlaridan 2 marta katta bo`lsa,3-DNK
malekulasini uzunligini aniqlang.
A)122,4 B)153 C)102 D)61,2
Ishlanishi: 1) 1-DNK=x/1,2; 2-DNK=x; 3-DNK=x/0,8; 4-DNK=x/2
2) 99+1=100AK 100AK*3=300N 300N*2=600N
3) 600*4,3=2580 -4 ta DNK dagi barcha N lar
4) x/1,2+x+x/0,8+x/2=2580
10x+12x+15x+6x=30960
43x=30960
x=720 -bu 2-DNK dagi N lar soni 720/2=360
5) D3=D2/0,8 D3=720/0,8 D3=900 900/2=450 6) L=N*0,34nm L=450*0,34nm L=153nm Javob: B _____________________________ 174. 4ta nomalum nukleotidli DNK molekulalarining biridan
su`niy
sharoitda
99ta
peptid
bog`li
oqsil
molekulasi
sintezlandi.Barcha DNK molekulasidagi nukleotidlar oqsil
biosinteziga javob bo`lgan DNK molekulasidan 4,3 marta ko`p. 2-
DNK nukleotidi 1-DNK nukleotidlaridan 1,2 marta, 3-DNK dan 0,8
marta, 4-DNK nukleotidlaridan 2 marta katta bo`lsa,oqsil
biosintezida ishtrok etgan DNK molekulasini uzunligini aniqlang.
A)122,4 B)153 C)102 D)61,2
Ishlanishi: 1) 1-DNK=x/1,2; 2-DNK=x; 3-DNK=x/0,8; 4-DNK=x/2
2) 99+1=100AK 100AK*3=300N 300N*2=600N
3) 600*4,3=2580 -4 ta DNK dagi barcha N lar
4) x/1,2+x+x/0,8+x/2=2580
10x+12x+15x+6x=30960
43x=30960
x=720 -bu 2-DNK dagi N lar soni
5) D1=D2/1,2 D1=720/1,2 D1=600 600/2=300 Javob: A 6) L=N*0,34nm L=300*0,34nm L=102nm Javob: C _____________________________ 175. 3 xil nomalum nukleotidli DNK malekulasi mavjud
bo`lsa.Ulardan oqsil sintezlanishi uchun jami 420 ta t-RNK
sarflangan. 2-DNK malekulasidan oqsil sintezlanishi uchun
sarflangan t-RNKlar soni 1-DNKdan oqsil sintezlanishi uchun
sarflangan t-RNKlar sonidan 0.75 marta kam, 3-DNKdan oqsil
sintezlanishi uchun sarf bo`lgan t-RNKlar sonidan 0.8 marta ko`p
bo`lsa, 3-DNKdagi nukleotidlar sonini aniqlang.