Question

A bacterial strain with a doubling time of 4 hours is mixed with another strain having doubling time 0f 9 hours in equal proportions. The growth is monitored during log phase which lasts for about 3 days. The observed doubling time will: 1. Remain constant at about 6.5 hours 2. Increase with time 3. Decrease with time 4. Fluctuate between 4 and 9 hours

Answer 1

Answer:

Explanation: My guess is that at the end of 3 days of incubation period the strain with doubling time in 4 hours will outnumber the strain with doubling time of 9 hours . There will be competitive inhibition/ elimination (competition for nutrients ) of the latter and only the strain with doubling time in 4 hours will survive . This is only a guess as competitive inhibition depends on the strain ,it varies from strain to strain .