Which gene transfer is associated with generalized transduction?
A. Lytic bacteriophage infection,
B. uptake of free DNA fagment.
Connection via sex pili,
D. prophage excision.
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Although two cells are totally unrelated, one cell receives DNA from the other cell and incorporates this new DNA into its chromosome. This process is _____.
A. crossing over of DNA from the two cells
B. vertical gene transfer
C. horizontal gene transfer
D. transposition
Which of the following statements about CONJUGATION is true?
A. Conjugation requires a sex pilus.
B. Conjugation involves a flagellum.
Conjugation is an artificial genetic engineering technique.
D. Conjugation involves DNA that has been released into the environment.
Which of the following is not a mechanism of natural genetic transfer and recombination?
A. transduction,
B. transformation,
C. transcription,
D. conjugation
发展，对于全面建设小康社会、加快推进社会主义现代化具有决定性意义，（ ）始终是社会主义的根本任务，要牢牢扭住经济建设这个中心，为发展中国特色社会主义打下坚实物质基础。
A. 解放和发展社会生产力
B. 发扬社会主义民主
C. 建设美丽中国
D. 加强法制建设
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