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Dr. Kazi Abdus Sobur
Bacteriology
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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
Replication cycle of Bacteriophages Reproduction (Replication cycle): Bacteriophages exhibit two types of replication cycle – virulent or lytic cycle and temperate or lysogenic cycle (Fig. 10.6). I. Virulent or lytic cycle: The phages undergoing ly… 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
Co-Transformation of Bacterial genome Co -Transformation: It is obvious that if the exogenous DNA that enters a recipient bacterial cell, contains known marker genes, say x, y and z, then these genes appear in the trans-formants, provided the segment or segmen… Read More
Artificial Transformation of Bacterial genome Artificial Transformation: For a long time, E. coli — a very important organism employed as a model in genetical and molecular biological research — was thought to be not amenable to transformation, because this organism i… Read More
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