of following can cause the great variation of influenza virus and
wide epidemic:()
A: gene
reassortment
B: gene
recombination
C: transduction
D: transformation
E: conjunction
举一反三
- Which<br/>of following can cause the great variation of influenza virus and<br/>wide epidemic:() A: gene<br/>reassortment B: gene<br/>recombination C: transduction D: transformation E: conjunction
- Which<br/>one of the following is the reason of pandemic<br/>flu<br/>() A: virus<br/>has strong virulence <br/>(B)HA<br/>of Influenza B: virus<br/>easily produce variation, and people lack of immunity <br/>(C)<br/>NA of Influenza C: virus<br/>easily produces variation, and people lack of immunity<br/>(D)<br/>Influenza D: virus<br/>develops new subtype virus, and people lack of immunity
- Which is not the mechanisms of horizontal gene transfer ( ) 以下哪一个选项不是水平基因转移的机制? A: transformation <br/>转化 B: Replication<br/>复制 C: transduction <br/>转导 D: conjugation <br/>接合
- Which<br/>of the following symptoms is not typical of influenza() A: Fever B: Muscular<br/>aches C: Malaise D: Dry<br/>cough E: Rash
- The<br/>integration mechanism of foreign genes in genetically modified crops<br/>are () A: Homologous<br/>recombination B: Site-specific<br/>recombination C: Transposition<br/>recombination D: Heterologous<br/>recombination
内容
- 0
The<br/>transfer of genetic material between bacteria in direct physical<br/>contact is called() A: conjugation B: transformation C: transduction D: lysogenic<br/>conversion E: mutation
- 1
Which<br/>of the following character about the pathogenesis of measles virus is<br/>wrong ( )? A: causing<br/>viremia twice B: transmitted<br/>through respiratory tract or contact C: most<br/>are inapparant infection D: Koplik’s<br/>spot is helpful in early diagnosis E: can<br/>infect central nervous system
- 2
Which<br/>of the following virus structure is derived from host cell membranes() A: nucleic<br/>acid B: capsid<br/>protein C: lipid<br/>bilayer D: sugar<br/>in spikes E: protein<br/>in spikes
- 3
Which<br/>one of following is most accurate?() A: HCV<br/>is transmitted through blood,but HDV not B: Both<br/>HBV and HCV can establish a chronic carrier state C: There<br/>is an effective vaccine against HCV but not against HDV D: Both<br/>HCV and HDV are defective virus E: Both<br/>HCV and HDV can be cultured artifially
- 4
Control of gene expression<br/>by preventing a gene from being expressed. () A: Transcription B: Induction C: Translation D: Replication E: Repression