Gemproteidlar va nukleoproteidlar sintezi va parchalanishi.(Sobirova) Variant 1
O'simtalarga ta’sir etuvchi aktinomitsin D oqsil biosintezini …. (110 bet)
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bioximya test
25. O'simtalarga ta’sir etuvchi aktinomitsin D oqsil biosintezini …. (110 bet)
A. ta;sir ko’rsatmaydi B.faollashtiradi C. ingibirlaydi* D. tog’ri javob yo’q
Mavzu: DNK ga bog'liq bo'lgan RNK sintezi 1. Hujayrada i-RNK necha foizni tashkil qiladi(7-b) A) 5%*
B) 7% C) 8%
D) 10% 2. Hujayrada ribosomalar nechtadan nechtagacha bo'ladi(8-b) A) 4 dan 100 gacha* B) 5 dan 20gacha C) 10 dan 50 gacha D) 20 dan 200 gacha 3. Hujayradagi ribosomalar qaysi RNK ning nukleotid zanjiri yordamida birlashib turadi(8-b) A) i-RNK* B) t-RNK C) m-RNK
D) n-RNK 4. I-RNK necha zanjirli(8-b) A) 1* B) 2
C) 3 D) 4
5. Polinukleotid zanjirda nukleotid qoldiqlarining tartib bilan joylashiga nuklein kislotalarning qanday strukturasi deyiladi(9-b) A) birlamchi* B) ikkilamchi C) uchlamchi D) to'rtlamchi 6. Ichak tayoqchasi mikrobi necha juft nukleotiddan tuzilgan(7-b) A) 31 juft* B) 41 juft C) 51 juft D) 61 juft 7. Hujayrada r-RNK umumiy RNK miqdorini necha % ini tashkil qiladi(7-b) Severen A) 80-90%* B) 20-30% C) 35-40% D) 50-60% 8. Nuklein kislotalar bilan oqsillar kompleks hosil qilgan komplekslarga misol keltiring(7-b) Severen A) ribosomalar B) virus
C) bakteriya D) a va b to'g'ri* 9. Eukoriot hujayra ribosomasida necha % RNK bo'ladi(7-b) Severen A) 50%*
B) 60% C) 70%
D) 80% 10. Eukoriot hujayra ribosomsida necha % oqsil bo'ladi(7-b) Severen A) 50%* B) 60%
C) 70% D) 80%
11. Prokariot hujayralar ribosomalarida r-RNK necha % bo'ladi(7-b) Severen A) 60-65%* B) 35-40% C) 50%
D) 60% 12. Prokariot hujayra ribosomalarida necha % oqsil bo'ladi(7-b)Severen A) 60-65% B) 35-40%* C) 50% D) 60%
13. Eukoriot hujayraralar qaysi organoid bilan bog'langan(7-b)Severen A) endoplazmatik tor* B) ribosoma C) lizosoma D) mitoxodriya 14. t-RNK hujayradagi butun RNK ning necha %ini tashkil qiladi(9-b) Severen A) 15%* B) 20%
C) 25% D) 30%
15. t-RNK ning molyar massasi qancha(9-b)Severen A) 25000-30000* B) 250-300 C) 2500-3000 D) 250000-300000 16. Hujayrada nechta t-RNK bor(9-b)Severen A) 20 dan ortiq* B) 10ta
C) 15ta D) 5 ta
17. t-RNK qanday vazifalarni bajaradi(9-b) Severen A) aminoatsil-t-RNK sintetaza ishtirokida aminokislotani biriktirish B) m-RNK dagi genetik kodni namoyon qilish C) ribosomada polipeptid zanjirga aminokislotani biriktirish D) barchasi* 18. RNK ning DNK dan farqi nima(5-b) Severin A) 1 zanjirdan iborat* B) 2 zanjirdan iborat D) t.j.y
19. r-RNK va i-RNK ikkilamchi strukturasi qanday shaklga ega(5-b)Severin A) ayrisimon B) shpilkasimon C) zanjirsimon D) a va b to'g'ri* 20. DNK ning ikkilamchi strukturasi qanday shaklga ega(5-b) A) qo'sh spiral* B) shpilkasimon C) ayrisimon D) zanjirsimon 21. DNK ning ikkilamchi strukturasi modelini kimlar taklif etgan(5-b) Severin A) D.Uotson B) F.Krik C) Sh.Shele D) a va b to'g'ri* 22. DNK necha zanjirdan iborat(6-b) Severin A) 2 ta* B) 3 ta
C) 4ta D) 5ta
23. DNK ning 2 ta zanjiri bir-biri bilan qanday shakl hosil qiladi(6-b) Severin A) spiral B) ayrisimon C) shpilkasimon D) sharsimon 24. DNK ning har bir zanjiri ketma-ket qaysi kislota va dezoksiriboza qoldiqlaridan tashkil topgan(6-b) Severin A) fosfat kislota* B) sulfat kislota C) xlorid kislota D) qahrabo kislota 25. DNK zanjirida uglevod qoldig'i nima bilan birikkan(6-b) Severin A) azot asosi* B) uglerod asosi D) vodorod asosi 26. DNK da azot asosi qanday bog'lar yordamida bog'langan(6-b)Severin A) vodorod bog'lar* B) metall bog'lar C) kovalent bog'lar D) donor-akseptor bog'lar 27. Qaysi olimlar "bizning struktura bir-biriga komplementar joylashgan qo'sh zanjirdan iborat" deb yozgan A) D.Uotson B) F.Krik C) Sh.Shele D) a va b to'g'ri* 28. Nuklein kislotalar denaturatsiyaga uchraydimi(6-b) Severin A) ha* B) yo'q
C) qisman D) t.j.y
29. DNK denaturatsiyasida qanday o'zgarish bo'ladi(6-b)Severin A) vodorod bog'lar uziladi B) qo'sh spiral struktura buziladi C) polinukleotid zanjirlar bir-biridan ajraladi D) barchasi* 30. DNK quyidagi nimalar ta'sirida denaturatsiyaga uchraydi(6-b) Severin 1. Xarorat 2. Mochevina 3. Spirt 4. Ishqor 5. Kislotalar 6. Fenol A) 1,3,4
B) 1,2,5 C) 4,5,6
D) barchasi* 31. DNK denaturatsiyasi necha bosqichda boradi(6-b)Severin A) 2* B) 3
C) 4 D) 5
32. Har xil tur DNK polinukleotid zanjirlarining bir-biri bilan komplementar qismlar orqali birikib qo'sh spiral hosil qilishiga nima deyiladi(6-b) Severin A) duragaylash* B) denaturatsiya C) renativatsiya D) spiralning tugunga o'tishi 33. Hujayra mag'zida nechta xromosoma bor(11-b) Severin A) 46 * B) 23
C) 53 D) 48
34. Har bir xromosoma tarkibi qanday tuzilgan(11-b) Severin A) 1 molekula DNK va 5 xil giston* B) 2 molekula DNK va 10 xil giston C) 3 molekula DNK va 15 xil giston D) 1 molekula RNK va 5 xil giston 35. Krik sut emizuvchilar xromasomasi uchun taklif etgan umumiy modelda DNK qanday ko'rinishda bo'ladi(11-b)Severin A) fibrillyar B) ipsimon C) globulyar D) barchasi* 36. DNK ni kodlashtirishda ishtirok etuvchi qismi qanday shaklda bo'ladi(11-b) A) ipsimon* B) globulyar C) sharsimon D) ayrisimon 37. DNK ning qaysi shalki giston va giston bo'lmagan oqsillar bilan kompleks holatida joylashgan(11-b)Severin A) ipsimon B) globulyar* C) sharsimon D) ayrisimon 38. Xromasoma modeli nechta nukleotiddan tuzilgan qaytariluvchi birikmalardan iborat(11-b)Severin A) 140 juft* B) 46 juft С) 40 juft D) 200 juft 39. Bo'linmayotgan eukariot hujayralarda xromasoma molekulasi nima deb ataladi(11-b)Severin A) xromatin* B) giston C) polimeraza D) fibrin 40. Xromatin iplari ko'rinishidan nimani eslatadi(11-b) A) muchoq ipini* B) zanjirni C) arqonni D) t.j.y 41. Nukleosomalar diametrini toping(11-b) A) 10-11 nm* B) 12-15 nm C) 16-18 nm D) 19-21 nm 42. Har bir nukleosoma tarkibiga necha molekula giston kiradi(11-b)Severin A) 8*
B) 10 C) 12
D) 14 43. Nukleosomalar orasida bog'lovchi linker,speer DNK joylashgan bo'lib u qaysi giston bilan bog'langan(11-b)Severin A) H1* B) H2A
C) H2B D) H4
44. Nukleosomalar orasida bog'lovchi qismidagi DNK ning uzunligi turga bog'liq ravishda nechta nukleotidgacha bo'lishi mumkin(11-b) Severin A) 20 dan 120* B) 40 dan 140 C) 60 dan 160 D) 70 dan 170 45. Nukleosomalar orasida bog'lovchi qismida odamlarda taxminan necha juft nukleotid bo'ladi(11-b)Severin A) 50juft* B) 60 juft C) 70 juft D) 80 juft 46. Hujayrada nuklein kislotalar qaysi moddalar bilan birga uchraydi(13-b) A) oqsillar* B) yog'lar C) uglevodlar D) tuzlar 47. Nuklein kislotalar bilan birga uchraydigan oqsillar qanday xossaga ega(13-b)Severin A) ishqoriy* B) kislotali C) neytral D) t.j.y
48. Nuklein kislotalar bilan birga uchraydigan oqsillar molekulasida qaysi aminokislota qoldiqlarini saqlaydi(13-b) A) arginin* B) sitin C) metionin D) fenilalanin 49. Protaminlar tarkibida necha % gacha arginin bo'ladi(13-b)Severin A) 75%* B) 20%
C) 25% D) 15%
50. Gistonlar tarkibida necha % arginin bo'ladi(13-b)Severin A) 75%
B) 20%* C) 25%
D) 15% 51. Quyidagi qaysi modda molekulasi o'zini o'zi yig'ish xossasiga ega(13-b)Severin A) nukleoproteidlar* B) protaminlar C) gistonlar D) polinukleotidlar 52. Polinukleotid zanjiridagi fosfat kislota qoldig'i qanday zaryadga ega(13-b)Severin A) manfiy* B) musbat D) t.j.y 53. Oqsil tarkibidagi arginin qanday zaryadga ega(13-b) A) manfiy B) musbat* C) zaryadga ega emas D) t.j.y
54. Nuklein kislota va oqsil qanday bog' hosil bo'ladi(13-b)Severin A) ion bog'* B) kovalent bog' C) vodorod bog' D) metall bog' 55. 20 ta replikativ ferment va omillardan iborat bo'lgan kopmleks nima deyiladi(13-b)Severin A) DNK-replikaza B) replusoma C) replikatsiya D) a va b to'g'ri * 56. Necha xil DNK-polimeraza bor(13-b) Severin A) 3*
B) 4 C) 5
D) 6 57. DNK zanjiri elongatsiyasiga qaysi DNK- polimeraza javobgar hisoblanadi(13-b)Severin A) III* B) I
C) II D) t.j.y
58. DNK-polimeraza I va DNK-polimeraza III necha xil fermentativ faollikka ega(14-b)Severin A) 3*
B) 4 C) 5
D) 6 59. Replikatsiya davrida hosil bo'lgan DNK ning ko'p qismi bo'lakchalar bo'lib ular nima deb ataladi(14-b) A) fragmentlar* B) giston C) protamin 60. DNK fragmentlari tarkibida nechta nukleotid qoldiqlarini o'zida saqlaydi(13-b) Severin A) 1000-2000* B) 100-200 C) 10-20
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