Definition Of Quorum Sensing In Biology

Quorum sensing is a mechanism of cell to cell signaling or density sensing in micro organisms.

Definition of quorum sensing in biology. Bacterial activity involving quorum sensing was first observed in. Quorum sensing allows bacteria populations to communicate and coordinate group behaviour and commonly is used by pathogens disease causing organisms in disease and infection processes. Quorum sensing in bacteria quorum. Quorum sensing a process in which unicellular organisms secrete signal molecules that influence the behaviour of a population of identical organisms but only when the density number of cells per unit volume of that population is above a certain level.

It is a latin word that means a group of members carries out an activity legally. Quorum sensing mechanism by which bacteria regulate gene expression in accordance with population density through the use of signal molecules. In biology quorum sensing is the ability to detect and to respond to cell population density by gene regulation as one example quorum sensing qs enables bacteria to restrict the expression of specific genes to the high cell densities at which the resulting phenotypes will be most beneficial. Many species of bacteria use quorum sensing to coordinate gene expression according to the density.

Most quorum sensing controlled processes are unproductive when undertaken by an individual bacterium acting alone but become beneficial when carried out simultaneously by a large number of cells. Quorum sensing bacteria produce and release chemical signal molecules called autoinducers that increase in concentration as a function of cell density. Quorum sensing is the regulation of gene expression in response to fluctuations in cell population density. Quorum sensing definition is a regulatory mechanism of bacteria that involves the release of molecules which when present at threshold concentrations signal the expression of bacterial genes controlling specific group actions such as the formation of biofilms.

The detection of a minimal threshold sti. When the density reaches a certain level genes.