Ciproflaxin is a broad spectrum antibiotic that kills most normal microbial inhabitants in the human gut. Clostridium difficile is found in small numbers in the normal flora of some healthy adults however this normal inhabitant of the gut is not affected by ciproflaxin. Clostridium difficile is innately resistant to ciproflaxin. After therapy with ciproflaxin patients who normally carry Clostridium difficile often exhibit Clostridium difficile-associated diarrhea. The change in ability of Clostridium difficile to cause disease would best be explained by the statement that [choose the statement below that you would argue is the best explanation.
a. Ciproflaxin interacted with Clostridium difficile in a manner to make the organism more pathogenic.
b. I do not know the answer to this question.
c. Ciproflaxin has killed the microbes that normally compete with Clostridium difficile in the gut allowing the microbe to grow uncontrolled.
d. Ciproflaxin acted as a mutagen. Ciproflaxin induced a mutation in Clostridium difficile to make the organism more pathogenic.
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During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.
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Ciproflaxin is a broad spectrum antibiotic that kills most normal microbial inhabitants in the human...
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