A pelvic examination of a 23-year-old woman showed vesicles and ulcerated lesions on her labia. Cultures were negative for Neisseria and Chlamydia; the VDRL test was negative. Which treatment is appropriate?
A) acyclovir
B) metronidazole
C) miconazole
D) penicillin
E) surgery
A
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The first penicillin-producing fungus that could be grown in stirred fermenters was ________.
A. Penicillium notatum B. Penicillium chrysogenum C. Aspergillus niger D. Pisolithus tinctorius
Pheromones are generally detected by the vomeronasal organ in most mammals, reptiles, and amphibians. (True)
A. true B. false
An antibiotic is added to a culture of E. coli, resulting in death of the cells. Bacteriophage are then added. Would the phage replicate in the E. coli cells? Why or why not?
A. Yes, because the machinery inside the cells is most likely still active, even though the cells are no longer living. The virus could use that machinery to replicate new virus particles. B. No, because the virus would depend too much on having the active machinery of a living cell for its replication. Without the ability of the cell to try to replace what is lost/damaged/used as the virus goes through its life cycle, the virus couldn't reproduce effectively. C. Yes, because viruses are capable of reanimating dead cells to force them to produce more virus particles. D. No, because entry of the virus into the target cell is dependent on the cell being alive to conduct endocytosis of the virus.
As with people, cancer is much more common among dogs that are obese and have low
activity levels. Obesity and activity level are thus considered __________ for cancer in dogs.
a. carcinogens b. risk factors c. indicators d. oncogenes