Which of the following microorganisms is the most commonly used indicator organism for water quality testing?
A. Escherichia coli
B. Salmonella spp.
C. Shigella spp.
D. Campylobacter jejuni
E. Hepatitis A virus
Answer: A
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A triglyceride molecule is made up of
a. one glycerol and two fatty acids. b. two fatty acids and two glycerols. c. one fatty acid and three glycerols. d. one glycerol and three fatty acids. e. any of these
You find a unicellular organism that forms lobe-like pseudopodia. When you expose the cells to
cAMP, they aggregate into a slug like structure. Based on this information, you correctly conclude that this organism is: a. Entamoeba histolytica. b. Dictyostelium discoideum. c. Chaos carolinense. d. Chlamydomonas. e. Physarum polycephalum
Answer the following questions true (T) or false (F)
1. Mucocutaneous leishmaniasis, also known as kala-azar, is fatal in 100% of untreated cases. 2. Smallpox vaccination was originally discontinued in the 1970s in the U.S. because of adverse effects of the vaccine. 3. Herpesvirus infections can be controlled with chemotherapeutic agents.
Koplik spots are a diagnostic indicator of
A) chickenpox. B) smallpox. C) fifth disease. D) rubella. E) measles.