MICRO-C-OMICS #16: Chemotaxis

We rely on our senses to guide our ways, and so are bacteria. During chemotaxis, bacteria adjust their movement in response to chemicals in the environment. If this chemical is a nutrient source or any other favorable substance, bacteria move towards the gradient of increasing concentration of the chemical. This is called positive chemotaxis. It is like discovering a restaurant by simply following the smell of an inviting food. If the chemical is toxic or somehow indicates unfavorable environment, bacteria escape from that area. This is called negative chemotaxis

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