A patient is experiencing profuse greenish-yellow, foul-smelling discharge from her vagina. She is complaining of itching and irritation. What is the most likely treatment?
A) metronidazole
B) cephalosporins
C) acyclovir
D) miconazole
E) No treatment is available.
A
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During the inflammatory response, dilation of blood vessels is caused by
A. nitric oxide. B. histamine. C. cytokines. D. phagocytes. E. both histamine and nitric oxide.
Which of the following accounts for someone who has had regular herpesvirus-mediated cold sore or genital sore flare-ups?
A) re-infection by a closely related herpesvirus of a different strain B) re-infection by the same herpesvirus strain C) copies of the herpesvirus genome permanently maintained in host nuclei D) copies of the herpesvirus genome permanently maintained in host cell cytoplasm
You observe an embryo with meroblastic cleavage, extraembryonic membranes, and a primitive streak. How would you identify this organism, based on the information given?
A) insect B) fish C) amphibian D) bird E) sea urchin
The event that occurs when allolactose levels increase in E. coli is
A. the tryptophan operon becomes more active. B. transcription of genes within the lac operon decreases. C. E. coli cells replicate rapidly. D. transcription of genes within the lac operon increases. E. transcription of genes within the lac operon does not change.