Archive | Bacteria

Plasmids in Bacteria: Properties, Types and Replication

In this article we will discuss about:- 1. General Properties of Plasmids 2. Types of Plasmids 3. Replication 4. Incompatibility 5. Library. General Properties of Plasmids: Plasmids are defined as extra-chromosomal genetic elements, occurring chiefly in bacteria and rarely in eukaryotic organisms. In bacteria, plasmids are circular double-stranded DNA molecules which contain genes controlling a wide variety of functions. In [...]

By |2016-09-01T09:13:21+00:00September 1, 2016|Bacteria|Comments Off on Plasmids in Bacteria: Properties, Types and Replication

Gene Transfer and Genetic Recombination in Bacteria

The following points highlight the three modes of gene transfer and genetic recombination in bacteria. The modes are: 1. Transformation 2. Transduction 3. Bacterial Conjugation. Mode # 1. Transformation: 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 [...]

By |2016-09-01T09:13:21+00:00September 1, 2016|Bacteria|Comments Off on Gene Transfer and Genetic Recombination in Bacteria

Sterilization of Bacteria: Top 4 Methods | Microbiology

The following points highlight the top four methods adopted for sterilization of bacteria. The methods are: 1. Heat Sterilization 2. Sterilization by Filtration 3. Sterilization by Radiation 4. Sterilization by Chemicals. Method # 1. Heat Sterilization: One of the common methods of sterilization is by application of heat. Bacteriological media, both liquid and solid, are generally sterilized by moist heat [...]

By |2016-08-31T15:42:02+00:00August 31, 2016|Sterilization|Comments Off on Sterilization of Bacteria: Top 4 Methods | Microbiology
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