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NUTRITION AND GROWTH OF BACTERIA NUTRITION AND GROWTH OF BACTERIA GROWTH CYCLE • Bacteria reproduce by binary fission, a process by which one parent cell divides to form two progeny cells. Because one cell gives rise to two progeny cells, bacteria ar$11.49
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NUTRITION AND GROWTH OF BACTERIA NUTRITION AND GROWTH OF BACTERIA GROWTH CYCLE • Bacteria reproduce by binary fission, a process by which one parent cell divides to form two progeny cells. Because one cell gives rise to two progeny cells, bacteria ar
NUTRITION AND GROWTH OF
BACTERIA
NUTRITION AND GROWTH OF BACTERIA
GROWTH CYCLE
• Bacteria reproduce by binary fission, a process by which one parent cell
divides to form two progeny cells. Because one cell gives rise to two
progeny cells, bacteria are said to undergo exponential growth...
, NUTRITION AND GROWTH OF BACTERIA
GROWTH CYCLE
• Bacteria reproduce by binary fission, a process by which one parent cell
divides to form two progeny cells. Because one cell gives rise to two
progeny cells, bacteria are said to undergo exponential growth (logarithmic
growth). The concept of exponential growth can be illustrated by the
following relationship:Thus, 1 bacterium will produce 16 bacteria after 4
generations.
• The doubling (generation) time of bacteria ranges from as little as 20
minutes for Escherichia coli to more than 24 hours for Mycobacterium
tuberculosis. The exponential growth and the short doubling time of some
organisms result in rapid production of very large numbers of bacteria. For
example, 1 E. coli organism will produce over 1000 progeny in about 3 hours
and over 1 million in about 7 hours. The doubling time varies not only with
the species but also with the amount of nutrients, the temperature, the pH,
and other environmental factors.
• The growth cycle of bacteria has four major phases. If a small number of
bacteria are inoculated into a liquid nutrient medium and the bacteria are
counted at frequent intervals, the typical phases of a standard growth curve
can be demonstrated
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