Calculate how long it would take a population of 100 million bacterial cells in stationary phase to all die if the decline phase is exponential with 90% of the population dying in 30
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Calculate how long it would take a population of 100 million bacterial cells in
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- Draw a graph that shows the potential population growth of a bacterial population that starts with 500 cells. Assume binary fission, a generation time of 30 minutes and reproduction for four (4) generations.Complete the table. Calculate the size of a theoretical population of E. Coli, if given unlimited resources and if no bacteria die.In which phase would you find the highest resource to bacterial cell ratio? Pick one Stationary Phase Log Phase Lag Phase Death Phase
- A single dose of mouthwash is added to a bacterial culture with 10 million cells/mL and, after 30 minutes, one hundred thousand viable cells/mL remain. How many would survive at the end of 1.5 hours? Based on the equation, can you ever totally decimate the population? In a practical sense, when would you assume that all the cells are dead?Log Nt = Log N0 – t/D. D is the time required for a log kill. A single dose of mouthwash is added to a bacterial culture with 10 million cells/mL and, after 30 minutes, one hundred thousand viable cells/mL remain. How many would survive at the end of 1.5 hours? Based on the equation, can you ever totally decimate the population? In a practical sense, when would you assume that all the cells are dead?If a bacterial population doubles every 60 minutes and you start with 2 cells in your broth, how many bacteria will you have after 24 hours?
- a. For an exponentially growing population, calculate μmax (units?) based on the data belowb. Calculate the specific growth rate (μ) of the population above growing at a substrate concentration of 25 mg/L according to Monod kinetics with a ks of 50 mg/L.c. Consider two genetically engineered organisms intended for use in the cleanup of hydrocarbon spills into the ocean. Bacterium alpha has a μmax of 1 d-1 and a ks of 0.1 mg/L. Bacterium beta has a μmax of 5 d-1 and a ks of 5 mg/L. If the hydrocarbon concentration is initially 1000 mg/L and the desired objective is to reduce concentrations below 0.1 mg/L what order of addition of the bacterial species is desired?You add 4 paramecia to a test tube and feed them bacteria. One week later the population has grown to 16. Assuming that the population is growing exponentially, how many paramecia can you expect after 10 weeks? Round your answer to the closest full number.Proteus vulgaris has a doubling time of roughly 28 minutes. If an initial population of 500 cells is allowed to grow for 6 hours in ideal conditions, what will be the final population? Use three significant figures for your final answer (e.g. 16,796.654 would become 16,800).
- Can a species undergo exponential growth indefinitely? Explain your answer.Complete Table 1by doubling the number of bacteria (Clostridium sp.) and diatoms (Chaetoceros sp.) every 30 minutes and 60 minutes, respectively, and by writing the log10 of this number in the appropriate columns with the results , Draw a graph showing the growth (N) of the populations of both species from time = 0 (also written as t0) to time = 310 (t310) minutes. Draw both populations on the same graph. NB: It will be necessary to plot Chaetoceros sp. on a second y-axis. Label the axes and provide a suitable legends.Is the exponential population growth of bacteria modelled best by a logarithmic or an exponential function? Why do you think this model fits so well?
