01:146:328 Study Guide - Final Guide: Variant Surface Glycoprotein, Giardia Lamblia, EntamoebaExam
DepartmentCell Biology and Neuroscience
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1. The function of the Gal/GalNAc lectin of Entamoeba histolytica is to
A. transport galactose into the trophozoite.
B. store galactose for use during the cyst stage.
C. bind to the surface of the host cell.
D. form pores in the lipid bilayer of the host cell.
E. increase host mucus production.
2. Which of the following correctly describes a mature Entamoeba histolytica cyst?
A. Usually does not have a chromatoidal bar.
B. Contains 2 nuclei.
C. Usually measures 40 – 50 μm in diameter.
D. Excysts in the large intestine.
E. Develops inside the vector.
1. Giardia lamblia
A. normally invades the bloodstream
B. has 2 median bodies
C. uses no reservoir hosts
D. reproduces only sexually
E. does not produce a cyst
2. Which of the following statements is CORRECT?
A. Entamoeba coli is parasitic and damages the human intestinal mucosa
B. Entamoeba dispar and Entamoeba histolytica are morphologically different
C. Entamoeba gingivalis does not form cysts
D. The cyst of Iodamoeba butschlii contains a large protein vacuole
E. The mature cyst of Endolimax nana contains 8 nuclei
3. One of the factors involved in vaginitis caused by Trichomonas vaginalis is
A. a decrease in pH to below 4
B. invasion of vaginal epithelial cells by the trophozoites
C. consumption of lactic acid-producing bacteria by the trophozoites
D. erosion of the vaginal mucosa by parasite cysts
E. mitochondrial waste products of the trophozoites
1. In the African trypanosomes, the trypomastigotes possess genes that code for _____________
which are antigens recognized by the host immune system.
A. variant surface glycoprotein
B. variant antigenic type
C. variable membrane acids
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