A-T=U+A =90+387=477
G-G=G+S =1530+270=1800
477+1800=2277
3) L=N*0,34=2277*0,34=
774,18 Javob: A
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33. Quyidagi DNK ketma-ketligiga mos bo’lgan RNK ketma-
ketligini aniqlang. (TTATSGGTAS)
A) UUAUSGGUAS
B) AAUAGSSAUG
C) AATSGGATS D) UUATSSSUTA
Ishlanishi:
1) DNK dagi 1-zanjir - AATSGGSTATA
DNK dagi 2-zanjir - TTAGSSGATAT
2) i-RNK dagi zanjir -
AAUSGGSUAUA Javob: B
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34. DNK ning 1-zanjirida nukleotidlar GSSATGSGTA
ko’rinishida. DNK ning 2-zanjiriga mos RNK nukleotidlarni
aniqlang.
A) SGGTASGSAT
B) GSSAUGSGUA
C) SGGAUSGSUA
D) GSSUAGSGAU
Ishlanishi:
1) DNK dagi 1-zanjir - GSSATGSGTA
DNK dagi 2-zanjir - SGGTASGSAT
2) i-RNK dagi zanjir -
GSSAUGSGUA Javob: B
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35. DNK molekulasida 1332 ta T bor. Timin nukleotidi umumiy
nukleotidlarning 25 % tashkil etadi. DNK molekulasida jami nechta
nukleotid bor
A) 3027 B) 5382
C) 5328 D)2664
Ishlanishi:
1) har doim A miqdori T ga, G miqdori S ga teng.
A-1332-25%=25%-1332-T ikkalasi 50% ni tashkil etadi.
2) 100%-50%=50% Demak, 50% i G va S ni tashkil etishi
kerak va ular:
G-25%-1332=1332-25%-S ni tashkil qiladi => A=T=G=S
3) (A)1332---25%
x --- 100% x=(1332*100)/25 x=
5328N Javob: C
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36. DNK molekulasida 2638 ta guanin bor. Guanin nukleotidi
umumiy nukleotidlarning 25 % tashkil etadi. DNK molekulasida
jami nechta nukleotid bor.
Dostları ilə paylaş: