The microbial growth is considered to be an increase in the cell size or the number of microbial cells. The microbes exhibit binary fission, where the single cell divides into two cells. The growth of the microbes can be exhibited in growth curve that as four phases, such as lag phase , log phase, stationary phase , and death phase.

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Definition Definition Phase during which the number of bacteria cell deaths gradually equals the number of viable or actively dividing cells due to decreased reproduction rate. Microbes utilize all nutrients present in the growth medium to multiply during the growth of the bacterial population, which results in the deposition of waste matter, toxins, and inhibitory compounds in the media. This changes media conditions, such as temperature and pH, creating an unfavorable environment for bacterial growth. Here, the growth rate becomes stabilized.

Chapter 11, Problem 3AL

Summary Introduction

The microbial growth is considered to be an increase in the cell size or the number of microbial cells. The microbes exhibit binary fission, where the single cell divides into two cells. The growth of the microbes can be exhibited in growth curve that as four phases, such as lag phase, log phase, stationary phase, and death phase.

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Two flasks of E. coli are grown in batch culture in the same medium (2% glucose and amino acids; no nitrate) and at the same temperature (378C). Culture #1 is well aerated. Culture #2 is anoxic. After 16 hours the following observations are made: ■ Culture #1 has a high cell density; the cells appear to be in stationary phase, and the glucose level in the medium is reduced to 1.2%. ■ Culture #2 has a low cell density; the cells appear to be in logarithmic phase, although their doubling time is prolonged (over 1 hour). The glucose level is reduced to 0.2%. Why does culture #2 have so little glucose remaining relative to culture #1, even though culture #2 displayed slower growth and has less biomass?

bacterial suspension with a population of 6.3 x 107cells/mL was diluted as follows: 4 mL was removed and added to 16 mL of diluent. This was again diluted 1 in 300. Determine the concentration of cells after EACH dilution. Concentration after the 1st dilution Concentration after the 2nd dilution

starting with four bacterial cells per milliliter in a rich nutrient medium, with a 1-hour lag phase and a 30-minute generation time, how many cells will there be in 1 ml of this culture after 10 hours?

Answer 2

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Definition Definition Phase during which the number of bacteria cell deaths gradually equals the number of viable or actively dividing cells due to decreased reproduction rate. Microbes utilize all nutrients present in the growth medium to multiply during the growth of the bacterial population, which results in the deposition of waste matter, toxins, and inhibitory compounds in the media. This changes media conditions, such as temperature and pH, creating an unfavorable environment for bacterial growth. Here, the growth rate becomes stabilized.

Chapter 11, Problem 3AL

Summary Introduction

The microbial growth is considered to be an increase in the cell size or the number of microbial cells. The microbes exhibit binary fission, where the single cell divides into two cells. The growth of the microbes can be exhibited in growth curve that as four phases, such as lag phase, log phase, stationary phase, and death phase.

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Answer 3

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Definition Definition Phase during which the number of bacteria cell deaths gradually equals the number of viable or actively dividing cells due to decreased reproduction rate. Microbes utilize all nutrients present in the growth medium to multiply during the growth of the bacterial population, which results in the deposition of waste matter, toxins, and inhibitory compounds in the media. This changes media conditions, such as temperature and pH, creating an unfavorable environment for bacterial growth. Here, the growth rate becomes stabilized.

Chapter 11, Problem 3AL

Summary Introduction

The microbial growth is considered to be an increase in the cell size or the number of microbial cells. The microbes exhibit binary fission, where the single cell divides into two cells. The growth of the microbes can be exhibited in growth curve that as four phases, such as lag phase, log phase, stationary phase, and death phase.

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Check out a sample textbook solution

See solution

Answer 4

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Definition Definition Phase during which the number of bacteria cell deaths gradually equals the number of viable or actively dividing cells due to decreased reproduction rate. Microbes utilize all nutrients present in the growth medium to multiply during the growth of the bacterial population, which results in the deposition of waste matter, toxins, and inhibitory compounds in the media. This changes media conditions, such as temperature and pH, creating an unfavorable environment for bacterial growth. Here, the growth rate becomes stabilized.

Chapter 11, Problem 3AL

Summary Introduction