the bacterial cells are at their metabolic peak during?
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The bacterial cells are at their metabolic peak during Log.
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Obligate aerobic bacteria gather at the top of the test tube in order to absorb maximal amount of oxygen. Obligate anaerobic bacteria gather at the bottom to avoid oxygen.
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Aerobic respiration is characteristic of eukaryotic cells when they have sufficient oxygen and most of it takes place in the mitochondria.
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Bacteria are prokaryotic organisms that reproduce asexually. Bacterial reproduction most commonly occurs by a kind of cell division called binary fission. Binary fission involves the division of a single cell, which results in the formation of two cells that are genetically identical.
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Bacterial growth is proliferation of bacterium into two daughter cells, in a process called binary fission. Providing no event occurs, the resulting daughter cells are genetically identical to the original cell. Hence, bacterial growth occurs. Both daughter cells from the division do not necessarily survive.
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Glucose, Lactate and Pyruvate as Energy Substrates.
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Bacteria, like all living cells, require energy and nutrients to build proteins and structural membranes and drive biochemical processes. Bacteria require sources of carbon, nitrogen, phosphorous, iron and a large number of other molecules. Carbon, nitrogen, and water are used in the highest quantities.
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Whereas essentially all eukaryotic organisms require oxygen to thrive, many species of bacteria can grow under anaerobic conditions. Bacteria that require oxygen to grow are called obligate aerobic bacteria.
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All cells are able to synthesize ATP via the process of glycolysis. In many cells, if oxygen is not present, pyruvate is metabolized in a process called fermentation. Fermentation complements glycolysis and makes it possible for ATP to be continually produced in the absence of oxygen.
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Fermentation: Fermentation is the chemical breakdown of an organic substrate like glucose by microorganisms like bacteria and yeast, typically giving off effervescence and heat. Respiration: Respiration is the set of chemical reactions involved in the production of energy by completely oxidizing food.
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Explanation: Metabolism means some substances will be broken down to produce energy and some other substances will be synthesised. ... In cellular respiration, oxidation of organic compounds take place in cell cytoplasm to produce energy in the form of ATP. This energy helps the cell to perform all metabolic activities.
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Bacteria that require oxygen to grow are called obligate aerobic bacteria. In most cases, these bacteria require oxygen to grow because their methods of energy production and respiration depend on the transfer of electrons to oxygen, which is the final electron acceptor in the electron transport reaction.
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Bacterial cells are very small - about 10 times smaller than most plant and animal cells. Most bacterial cells range in size from 0.2 to 10 microns or micrometers (0.0000079 to 0.00039 inches).
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The factors that affect bacterial growth include: Time – in ideal conditions, one bacterium can multiply to more than two million in seven hours. Temperature – food poisoning bacteria grow best in the temperature range between 5 °C and 60 °C. This is referred to as the 'temperature danger zone'.
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In autecological studies, the growth of bacteria (or other microorganisms, as protozoa, microalgae or yeasts) in batch culture can be modeled with four different phases: lag phase (A), log phase or exponential phase (B), stationary phase (C), and death phase (D).
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These colorful microorganisms are called extremophiles—these in particular are thermophiles. Bacteria may grow across a wide range of temperatures, from very cold to very hot. A mesophile is an organism that grows best in moderate temperature, neither too hot nor too cold. All human pathogens are mesophiles.
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In order to grow in nature or in the laboratory, a bacterium must have an energy source, a source of carbon and other required nutrients, and a permissive range of physical conditions such as O2 concentration, temperature, and pH.