Because genes do not "know" when to mutate, it follows that bacterial species with a resistance to an antibiotic must have had a mutation ______ exposure to the antibiotic.Multiple choice question.caused byafterbefore
Question
Because genes do not "know" when to mutate, it follows that bacterial species with a resistance to an antibiotic must have had a mutation ______ exposure to the antibiotic.Multiple choice question.caused byafterbefore
Solution
The correct answer is "before". This is because the mutation that confers resistance to an antibiotic must have occurred before the bacteria were exposed to the antibiotic. If the mutation occurred after exposure, the bacteria would not survive the antibiotic treatment. Therefore, the bacteria with the resistance mutation were already present in the population when the antibiotic was introduced. This is a principle of natural selection: those individuals with traits that confer a survival advantage in a particular environment are more likely to survive and reproduce, thereby passing on these advantageous traits to their offspring.
Similar Questions
New alleles that might allow a bacterium to become resistant to an antibiotic arise throughMultiple choice question.mutation.genetic drift.induction by the antibiotic.antibiotic alteration.
In this experiment, the bacteria stopped spreading when they reached an area with a higher concentration of antibiotics. Remember that there are millions of bacteria and that they reproduce very quickly. After a while, a new "mutant" population can be seen fanning out from a single point.Using the concepts from this lesson, explain how this new population with higher antibiotic resistance arises.
If there is NO zone of inhibition present, the bacteria is said to be ____ to the antibiotic. susceptibleintermediately susceptibleresistant
What is a likely cause of antibiotic resistance?
Horizontal gene transfer in bacteria can result in (check all that apply) Question 4 options: Organism producing virulence factors like exoenzymes Organism producing virulence factors like exotoxins Genes for capsule formation Genes for adherence molecules organism becoming resistant to antibiotics
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