A bacterium that is resistant to an antibiotic will: Grow in the presence of that antibiotic Will be killed or inhibited in the presence of that antibiotic Produce that antibiotic Will destroy that antibiotic
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Step 1: A bacterium that is resistant to an antibiotic has developed mechanisms to evade the effects of that antibiotic. Show more…
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When an antibiotic is first introduced, it is very effective for treating infections. With increasing use of the antibiotic, the effectiveness declines and eventually the antibiotic fails to cure the infection. The evolution of antibiotic resistance occurs because… A) Human bodies become immune to the effects of the antibiotic, and so we have to take more and more of it, and eventually, we are completely immune, and the antibiotic no longer works. B) Bacteria targeted by the antibiotic become stronger in response to exposure to the antibiotic. As a result, fewer and fewer bacteria die from the antibiotic. C) There were one or a few bacterial cells that were able to survive in the presence of the antibiotic due to an existing mutation, and these individuals reproduced. D) The presence of the antibiotic caused bacteria to develop mutations that allowed them to resist the effects of the antibiotic. These individuals reproduced, and the number of resistant bacteria increased.
Josee P.
Antibiotic Resistance 1.a) A colony of antibiotic-resistant bacteria is mixed with a colony of antibiotic-sensitive bacteria. After a few days, ALL of the bacteria are now resistant to the antibiotic. Which of these is most likely to result in this rapid spread of resistance in a bacterial population? (assuming no antibiotic-resistant bacteria died) - Conjugation - Binary fission - Transformation - Transduction 1.b) A colony of antibiotic-resistant bacteria is mixed with a colony of antibiotic-sensitive bacteria. After a few days grown in the presence of antibiotics, all of the bacteria are resistant to the antibiotic. Which of these is most likely to result in this rapid spread of resistance in a bacterial population? - Conjugation - Transformation - Transduction - All of the above are equally responsible for the spread of antibiotic resistance
Adi S.
More strains of bacteria that are resistant to most antibiotics are showing up because: - bacteria reproduce very rapidly - antibiotics do not kill all of the cells in a bacterial population - antibiotics are being prescribed for viral diseases - all of the above contribute to antibiotic resistance.
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