Beneficial, Neutral, or Harmful!
Suppose that a bacterium recieves a mutation that confers resistance to an antibiotic that is not present in the envrionment. Beneficial or neutral?
Suppose further that the mutation causes resistance by changing a gene product that allows the bacterium to metabolize lactose when glucose is not present. The protein no longer has that function but now promotes resistance against the antibiotic. Neither lactose nor the antibiotic are present in the environment, and glucose is present. Beneficial, neutral, or harmful?
The antibiotic is present, but lactose is not. Beneficial, neutral, or harmful?
Lactose is present, but the antibiotic is not. Beneficial, neutral, or harmful?
Both lactose and the antibiotic are present. Beneficial, neutral, or harmful?
A new antibiotic is introduced that specifically targets the mutation. Wild-type bacteria are not affected. Beneficial, neutral, or harmful?
Edited by crashfrog, : No reason given.