Multiple Choice
Researchers studying fungal pathogens isolated an ergosterol biosynthetic gene by polymerase chain reaction. Using homologous recombination, they then developed a new strain of Candida with a mutated allele for that gene. The mutant strain was cultured in the presence of several different antifungal agents. Compared to isolates from the wild-type strain, isolates from the mutant Candida strain exhibited enhanced growth in the presence of drug X. Further investigation revealed that the mechanism of resistance to drug X was a decrease in ergosterol incorporation into the cell membrane. Based on this data, drug X is likely to be most closely related to which of the following antifungal agents?
A) Caspofungin
B) Cyclosporine
C) Flucytosine
D) Griseofulvin
E) Nystatin
Correct Answer:

Verified
Correct Answer:
Verified
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