The time interval for bacteria from parent cell to two new daughter cells is called the A. binary fission. B. growth curve. C. generation time. D. death phase. E. culture time.

The phase of the bacterial growth curve that shows the maximum rate of cell division is the A. lag phase. B. exponential (log) phase. C. stationary phase. D. death phase. E. prophase.

A bacterial strain is growing exponentially. At 10:00 am the titre of the culture is 4 x 106 cells per ml. At 4 pm, the culture is still growing exponentially and the titre has increased to 6 x 108 cells per ml. Assuming that the bacterial strain was in exponential phase growth prior to the measurements at 10:00 am, how many generations would have elapsed between 08:00 am and 4pm? Show all of your calculations. This culture will eventually reach the death phase when the nutrients become limited. What does happen in this phase? What strategies do bacteria develop to cope with nutrient shortages?

5 x 104 cells of Bacillus cereus were inoculated into fresh sterile nutrient medium and incubated at 30oC. After 2 hour lag phase, cells grew exponentially with a generation time of 30 minutes. How many cells would be present after 8 hours incubation? The growth of the bacterium in log phase can be expressed by the following equations: N1 = N0 2n & g = (T1 – T0) / n Where n = number of generations, N0 = initial number of cells at a particular time (T0), N1 = final number of cells at a particular time (T1), and g = generation time Group of answer choices 1.28 x 107 cells/ml 4.10 x 107 cells/ml 2.05 x 108 cells/ml 3.28 x 109 cells/ml 5.24 x 1010 cells/ml

A bacteria culture initially contains 100 cells and grows at a rate proportional to its size. After an hour the population has increased to 420.

A culture of bacteria has an initial population of 83000 bacteria and doubles every 10 hours. Using the formula P, start subscript, t, end subscript, equals, P, start subscript, 0, end subscript, dot, 2, start superscript, start fraction, t, divided by, d, end fraction, end superscriptP t​ =P 0​ ⋅2 dt​ , where P, start subscript, t, end subscriptP t​ is the population after t hours, P, start subscript, 0, end subscriptP 0​ is the initial population, t is the time in hours and d is the doubling time, what is the population of bacteria in the culture after 3 hours, to the nearest whole number?