The main advantage of phagemid is that it can be used for the generation of single or double stranded products without recloning. __________
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Alpha complementation is an indicator of lacZ system. Which of the statement is incorrect for it? __________
A.One portion of the lacZ gene known as minigene is present in the plasmid
B.Another portion is present in the host itself
C.If they both are allowed to combine in the presence of IPTG, X-gal and ampicillin, blue colonies are observed
D.If insert is also present along with host and plasmid, it results in the formation of blue colonies
标记用于为表单内容分组，其配套标记，用于为各个表单组定义名称。
A. 对
B. 错
简述东西方休闲观的主要思想特点以及休闲体育文化的主要区别。
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