Archive | Microorganisms

Process of Nitrogen Fixation in Microorganisms | Microbiology

In this article we will discuss about the process of nitrogen fixation in microorganisms. The symbiotic association of cyanobacteria with fungi (lichen), cyanobacteria with bryophytes (Anthoceros), with pteridophytes, (Azolla) with gymnosperms (coralloid root of Cycas) and bacteria (Rhizobium Brady-rhizobium, Azorhizobium, Sino-rhizobium, Ensifer and Mesorhizobium etc.) with leguminous plants are under mutual beneficial relationship (symbiosis) in which both the host and [...]

By |2016-11-28T11:04:41+00:00November 28, 2016|Microorganisms|Comments Off on Process of Nitrogen Fixation in Microorganisms | Microbiology
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Classification of Toxins | Microbiology

Based on activ­ity, toxins are divided into three types: type I (that act the cell membrane), type II (that attack the cell membrane), and type III (that penetrate the mem­brane to act inside the cell). 1. Membrane Transducing Toxins: These type of toxins are type I toxins which damage host cells by subtle means through inappropriate activation of cellular receptors. [...]

By |2016-11-28T11:03:54+00:00November 28, 2016|Microorganisms|Comments Off on Classification of Toxins | Microbiology
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Evolution of Genomes in Microorganisms | Microbiology

In this article we will discuss about the evolution of genomes in microorganisms. The prokaryotes contain a large single, circular dsDNA molecule, usually less than 5 Mb long. In addition, they may also contain plasmids. The genome is arranged into operons. A typical prokaryotic genome contains a small amount of non-coding DNA distributed throughout the sequence. For example, E.coli contains [...]

By |2016-11-28T11:03:53+00:00November 28, 2016|Microorganisms|Comments Off on Evolution of Genomes in Microorganisms | Microbiology
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