Read the scenario above. If the population is maintained on media that lacks rifampin, what is expected to occur over a period of time?
A) The rifampin resistant bacteria will increase in proportion compared to the rifampin susceptible bacteria.
B) The rifampin susceptible bacteria and the rifampin resistant bacteria will remain in approximately equal proportions.
C) The rifampin susceptible bacteria will increase in proportion to the rifampin resistant bacteria.

Question

Quizplus · Accepted Answer

In the absence of rifampin, the selective pressure that favors the survival of rifampin-resistant bacteria is removed. Therefore, the rifampin-susceptible bacteria, which may have a fitness advantage in the absence of the drug, are likely to increase in proportion relative to the rifampin-resistant bacteria.

Read the Scenario Above