Hfr cells have  _______ plasmid. 
A、 one free F
B、several chromosome-integrated F
C、several free F
D、one chromosome-integrated F
微生物学（双语）MOOC-2022春

章节列表

1 The Microbial World102 Microbial Cell Structure and Function106 Molecular Information Flow and Protein Processing104 Microbial Growth and Its Control157 Microbial Regulatory Systems105 Viruses and Their Replication109 Genetics of Bacteria and Archaea1011 Viral Genomes, Diversity and Ecology1013 Microbial Evolution and Systematics1014 Metabolic diversity10Appendix 文献检索与利用（不作要求）110 Microbial Genomics and Other Omics13Mid-term Homework1