Ishlanishi: 1) 34-3=31 AK ga
31 ta t-RNK javobgar.
2) 1 ta i-RNK sintezga javobgar hisoblanadi.
Javob: C ____________________________
70. 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 r-RNK sonini aniqlang.
A) 34 B) 31 C) 1
D) 2 Ishlanishi: 1) 34-3=31 AK ga
31 ta t-RNK javobgar.
2) 2 ta r-RNK sintezga javobgar bo’ladi.
Javob: D ____________________________
71. DNK molekulasining uzunligi 42,84 nm bo’lsa, shu molekula
asosida sintezlangan oqsil tarkibidagi aminokislotalar sonini
aniqlang.
A) 42 B) 84 C) 21 D) 168
Ishlanishi: 1) L=N*0,34 => N=L/0,34 N=42,84nm/0,34nm=126N
2) i-RNK
126 ta nukleotid bo’ladi. Shunga ko’ra, bu nukleotidlar
nechta aminokislotani kodlashini topamiz :
AK=N/3 AK=126N/3=
42AK Javob: A ____________________________
72. DNK molekulasining uzunligi 42,84 nm bo’lsa, shu
molekulasidagi nukleotidlar sonini toping.
A) 126
B) 252 C) 504 D) 63
Ishlanishi: 1) L=N*0,34 => N=L/0,34 N=42,84nm/0,34nm=126N
2) i-RNK
126 ta nukleotid, DNK da 2 ta zanjirda :
126*2=
252N Javob: B ____________________________
73. DNK molekulasining uzunligi 42,84 nm bo’lsa, shu molekula
asosida sintezlangan oqsilning og’irligini toping. 1 dona
aminokislotaning o’rtacha og’irligi 120 D.
A
) 5040 B) 10080 C) 2520 D) 20160
Ishlanishi: 1) L=N*0,34 => N=L/0,34 N=42,84nm/0,34nm=126N
2) i-RNK
126 ta nukleotid bo’ladi. Shunga ko’ra, bu nukleotidlar
nechta aminokislotani kodlashini topamiz :
AK=N/3 AK=126N/3=42AK
3) M=AK*120 M=42*120=
5040D Javob: A ____________________________
74. DNK molekulasining uzunligi 42,84 nm bo’lsa, shu molekula
tarkibidagi fosfodiefir bog’lari sonini aniqlang.
A) 124 B) 125
