Meaning & Structure of Resistance Plasmid
Meaning of Resistance Plasmid:
Resistance factors or resistance plasmids are a group of conjugative plasmids which confer to their bacterial host resistance to specific antibiotics, such as, chloramphenicol, sulphonamide, …Read More
Natural Transformation of Bacterial Genome
In natural transformation of bacteria, free naked fragments of double-stranded DNA become attached to the surface of the recipient cell. Such free DNA molecules become available in the environment by natural decay and lysis…Read More
F-Plasmids and Sexduction
Just as F-plasmids can be integrated into the chromosome, so they can also be occasionally excised from the Hfr-chromosome to produce a free plasmid. Sometimes, the excision does not occur in a precise manner by exact rever…Read More
Transformation of bacterial genome
Historically, the discovery of transformation in bacteria preceded the other two modes of gene transfer. The experiments conducted by Frederick Griffith in 1928 indicated for the first time that a gene-controlled characte…Read More
Restricted Transduction of Bacterial genome
Restricted transduction is mediated by certain temperate bacteriophages, like the λ-phage (lambda phage) of E. coli, which enters into a lysogenic relationship with the host bacterium. This type of phages normally doe…Read More
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