Question

write a short report, 250 words about "Microbial growth". Author's name or website's name and title of article in APA format, date of publication or copyright, its relevancy to your future career goals and one potential multiple test question.

Answer 1

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Microbial growth is the whole process starting from the birth of a microbe, its growth and maintenance, the division or reproduction that takes place, the production of secondary metabolites and finally the death of that microbe. For a microbe. To survive and grow adequately several parameters should be taken care of (in case of laboratory).
Physical requirements for a microbe to live are temperature and pH using buffers in media at optimal enzyme operation. On the basis of temperature the microbes are divided into three categories, they are Psychrophiles,mesophiles and thermophiles.
Chemical requirements for the microbial growth are carbon source in the medium,Nitrogen,sulphur,phosphorus trace elements.Oxygen is also one of the most important chemical requirement based on which the microbes are categorized into obligate aerobes,anaerobes and facultative anaerobes.
Different culture media are to be used for different microbes.
We usually use chemically defined and undefined media or Complex media in some cases. For anaerobes culturing we add reducing bacteria.
The growth of the microbes can be divided into four major phases. These are explained as follows.
The lag phase:The lag phase is where The microbe undergoes maintenance and only increases in size.
The log phase:The log phase is where the the exponential increase in number takes place. Division happens in this phase.
The stationary phase:Stationary phase is a phase for the production of secondary metabolites and here the rate of division and death are roughly equal.
The death phase:Death phase occurs when the microbes run out of nutrients and also competition increases among the microbes. the death rate slowly starts increasing and the microbes rate Keep decreasing

The study of these things i.e, growth of microbes in very important in the field of biotechnology as these bacteria are very important in experiment point of view. They produce very important metabolites which are used in medical, food, and other industries. This study of their growth helps us to produce things more efficiently and effortlessly and also gives us the total control over the growth and production.