作者roscoeyang (熊熊)
看板TransBioChem
标题[生物] 细菌病毒章节问题
时间Sun Jun 10 12:34:40 2012
1）emerging viruses arise by
A)mutation of existing viruses
B)the spread of viruses to a new host species
C)border dissemination of an existing viruses within the current host population
D)all of the above
E)none of above
答案是A,可是我觉得是D
2)an organism that is modified by introduction of a DNA sequence from another organism is called
A)transformed
B)transgenic
C)transferred
D)transduced
E)a muti-species
答案是B,但是我觉得是A,因为transformation (性状转变)不是细菌病入外来DNA 吗？
另外请教，provirus /prophange差在哪里呢？
谢谢大家
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1F：→ eric4111tim:产生新病毒的先决条件为突变 06/10 23:30
2F：→ eric4111tim:传给不同物种 也是要先经由突变再换宿主 因为每个病毒 06/10 23:31
3F：→ eric4111tim:寄生都有一定的宿主限制(host range)突变後才可下一步 06/10 23:33
4F：→ eric4111tim:性状转变是并入外来DNA没错 可是是并入死去细菌的DNA 06/10 23:37
5F：→ eric4111tim:并完全改变其性状，而genetic仅是互相交换DNA 没有要 06/10 23:38
6F：→ eric4111tim:且完全转换性壮 我觉得跟modified这个字有关欸 06/10 23:47