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

Exactly 200 bacteria are inoculated into fresh sterile growth medium at 9am and maintained at an optimum incubation temperature throughout the day. If the bacteria had a generation time of 30 minutes and there was a 1 hour lag period, how many generations will then take place by 3pm? The growth of the bacterium in log phase can be expressed by the following equations: Nt = N0 2n & g = (T – T0) / n Where n = number of generations, N0 = initial number of cells at a particular time (T0), Nt = final number of cells at a particular time (T), and g = generation time Group of answer choices 8 10 12 20 24

A student adds 5 bacterial cells to a test tube containing fresh medium and incubates it for 3 hours at 37°C.  The bacterial population shows an initial lag phase of 20 minutes followed thereafter by a growth phase with a doubling time of 40 minutes.  Given this, what is the approximate number of bacterial cells present at the end of the incubation period?  (Note:  Assume unrestricted growth during incubation.)A.20 cellsB.40 cellsC.80 cellsD.160 cells

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?

Bacteria are growing in a liquid growth medium.There were 300,000 cells per milliliter during aninitial observation. The number of cells per milliliterdoubles every 3 hours. How many cells per milliliterwill there be 15 hours after the initial observation?A) 1,500,000B) 2,400,000C) 4,500,000D) 9,600,000

Bacteria are growing in a culture, and their number is increasing at the rate of 7% per hour. Initially, 500 bacteria are present.Determine an equation that gives the number, 𝑁, of bacteria present after 𝑡 hours.