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【多选题】
下列成分属于二次代谢产物的是( )A.
叶绿素
B.
生物碱
C.
蛋白质
D.
黄酮
E.
皂苷
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皮皮学刷刷变学霸
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【多选题】Which of the following statements about non-viral vectors for gene therapy are correct?
A.
Non-viral methods present certain advantages over viral methods, such as large scale production and low host immunogenicity.
B.
However, non-viral methods initially produced lower levels of transfection and gene expression, and thus lower therapeutic efficacy.
C.
Later technology remedied this deficiency.
D.
Methods for non-viral gene therapy include the injection of naked DNA, electroporation, the gene gun, sonoporation, magnetofection, the use of oligonucleotides, lipoplexes, dendrimers, and inorganic nanoparticles.
【简答题】是世界上延续时间最长的人才选拔制度。 was the longest talent selection system in the world.
【简答题】是世界上延续时间最长的人才选拔制度。 was the longest talent selection system in the world.