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A species of Antarctic bacteria doubles in number every 18 months. calculate the growth constant (k)
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- Calculate the generation time in a growth experiment in which a medium was inoculated with 5 X 106 cells/mL of E. coli cells and following a 1 hour lag, grew exponentially for 5 hours, after which the population was 5.4 X 109cells/mLIf it takes 2 hours for a population of bacteria to grow from 100 cells to 1600 cells, what is the generation time of this bacterial species? 15 minutes 20 minutes 30 minutes 40 minutesIf the generation time is 90 min and the initial population contains 103 cells, how many bacteria will there be after 8 hours of exponential growth?
- What is the generation time (in minutes) of a bacterial population that increases from 10,000 cells to 10,000,000 cells in fours hours of growth? Show computation.In a laboratory setting, E. coli has a doubling time of 20 minutes.a) What is its growth rate, r?b) Assuming you start with only 2 cells, what will be the bacterial population after 24hourshave passed?If a bacterial species is not susceptible to an antibacterial drug at the concentration present in a particular disk, does that necessarily mean the species is completely resistant to the drug? Explain your answer.
- Derive a discussion and conclusion for E.coli growth rates at different temperatures and time for 90minutesWhen you compare the standards on bacteria, recreational use of water has a higher standards than the industrial use? at 1,000 and 100 per 100 mL, respectively. Explain.List and describe the phases of the growth curve of a population of bacteria. Explain how a decrease in one environmental factor (choose oxygen, temperature, OR pH for your explanation) might affect the growth curve of that bacterial population.
- Give an example of an industrial/clinical setting where quantifying viable bacteria would be useful. How would you prepare a series of dilutions to get a final dilution of 10–10? Outline each step.In growing E.coli, why is that (reasons) they do not grow after doubling time under 20 degrees celsius and under 37 degrees celsius, the number of colonies after doubling time has decreased? provide reliable sources (links).If the original number of cells in a sample was 12,000, how many bacteria will be present in 12 hours when the generation time is 15 minutes?