Below is a table for the size of a population of yeast cells in a flask. Yeast Cells per ml of water Hour 5.0 1 23.6 2 45.8 3 78.2 4 104.6 121.4
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- 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?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?What is the "2" stand for in the following equation? Nt= No x 2n a.The rate of growth- the population doubles with each generation b.How many individual cells there after a given time c.The dilution factor of each individual serial dilution d.How many generations there are
- 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?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.Bacteria reproduce by fission (splitting in two) and can respond very rapidly to environmental changes. A culture of bacteria is found to contain 4.95 X 109 bacteria and the carrying capacity of the culture is 5.0 X 109. How will the bacterial population change in the near future. Group of answer choices -it will increase very rapidly to K -it will increase very slowly to K -it will grow exponentiall -it will decrease very rapidly to K
- 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 also draw a graph of log10 of the number of both organisms over time (on the same graph as each other but on a different graph from the previous graph). Label the axes and provide a suitable legend.Assuming the original 10 organisms grew exponentially, doubling in size with every unit of time, calculate the population size from t0 to t4 and draw the position of this curve on your graph. Adjust your figure legend.An experiment began with 3 cells and ended with 96 cells. Assuming exponential growth, how many generations did the cells go through? a) 4 b) 5 c) 6 d) 32 e) 64
- The three microbial species shown in the graph where all treated at 70° C. When we have to sterilize a food product that contained 107 bacteria, the time taken for each bacterial species would be:- For species A :- 42 minutes For species B :- 70 minutes For species C :- 112 minutes arrow_forward Step 3 The D70 values for these three bacterial populations. D70 for microbial species A= 42 minutes B: D70 microbial species B= 70 minutes C: D70 microbial species C =112 minutes Please answer these questions below: please use drawings too (i learn best that way) For the next three questions, assume D90 = 22 minutes. At what temperature will you treat a food product? How long does it take you to kill 90% of bacteria? How long will it take you to sterilize a food product if it had 109 bacteria on it?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 minutes.The growth rate of a population per unit of time is calculated by using this formula: G = r x N. What is the quantity r and how is it calculated?