1. Tirik mavjudodlar bundan necha yil avval kelib chiqqan?

11.Quyidagilardan virus kasalligini ajrating?

1)gripp 2)gommoz 3)quturish 4)sariq 5)qorakuya 6)ensfalit

7)qizilcha 8)vertitsil

A)1, 2, 3, 6, 7, 8 B)1, 3, 4, 6, 7

C)1, 2, 4, 6, 8 D)1, 3, 4, 5, 6, 7
12.Tamaki moziakasi virusi qanday qismlardan tuzilgan?

A)oqsil qobig’, RNK

B) oqsil qobig’, DNK

C) oqsil qobig’, RNK, DNK

D)membrana, sitoplazma, DNK
13.Nuklein kislotalarga ko’ra viruslar qanday guruhlarga bo’linadi?

A)2ga: RNK yoki DNK saqlovchi

B)2ga: RNK, DNK saqlovchi, parazit

C)2ga: DNK saqlovchi va DNK siz

D)2ga: RNK saqlovchi va RNK siz
14.Tamaki mozaikasi RNK si qanday shaklda?

A) halqasimon B)tayoqsimon

C)sharsimon D) spiralsimon