Gemproteidlar va nukleoproteidlar sintezi va parchalanishi.(Sobirova) Variant 1

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

C) genetik kodga ega

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

C) oltingugurt 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

C) zaryadga ega emas

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

D) polinukleotid

60. DNK fragmentlari tarkibida nechta nukleotid qoldiqlarini o'zida saqlaydi(13-b) Severin

A) 1000-2000*

B) 100-200

C) 10-20

D) 1-2