MICROBIOLOGY MOST TESTED QUESTIONS AND THEIR CORRECT ANSWERS

What is the common cause of yeast infections? a. Aspergillus b. Candida albicans c. Histoplasma d. Penicillium b. Candida albicans Which fungus causes the most common life-threatening infection in AIDS patients? a. Aspergillus b. Candida c. Rhizopus d. Pneumocystis d. Pneumocystis All of the following are fungi EXCEPT a. molds. b. yeasts. c. Paramecium. d. Penicillium. c. Paramecium. What term refers to fungal infections deep within the body? a. systemic mycoses b. cutaneous mycoses c. subcutaneous mycoses d. superficial mycoses a. systemic mycoses Which is the correct order of events for sexual reproduction in fungi? a. meiosis, plasmogamy, karyogamy b. plasmogamy, karyogamy, meiosis c. karyogamy, plasmogamy, meiosis d. karyogamy, meiosis, plasmogamy b. plasmogamy, karyogamy, meiosis All of the following groups of algae produce substances that are toxic to humans EXCEPT a. green algae. b. diatoms. c. red algae. d. dinoflagellates. a. green algae. Which type of algae is found at the greatest depth in water? a. blue algae b. red algae c. brown algae d. green algae b. red algae The body of a multicellular alga is called a a. mycelium. b. hypha. c. pseudopod. d. thallus. d. thallus. What is the etiological agent of ciguatera? a. Alexandrium b. diatoms c. Phytophthora d. Gambierdiscus d. Gambierdiscus Paralytic shellfish poisoning is caused by members of the genus Alexandrium, which secrete a. aflatoxins. b. endotoxins. c. exotoxins. d. saxitoxins. d. saxitoxins. The feeding or growing stage of a protozoan is called a. merozoite. b. microspora. c. trophozoite. d. sporozoite. c. trophozoite. The only pathogenic ameba found in the human intestine is a. Amoeba proteus. b. Entamoeba histolytica. c. Plasmodium vivax. d. Toxoplasma gondii. b. Entamoeba histolytica. Ciliates take in food by way of the a. vacuole. b. cytosome. c. pseudopod. d. mitosome. b. cytosome. The organism that requires domestic cats in its life cycle is a. Acanthamoeba. b. Plasmodium vivax. c. Entamoeba histolytica. d. Toxoplasma gondii. d. Toxoplasma gondii. Which of the following statements about protozoa is FALSE? a. All make cysts. b. They have eukaryotic cells. c. They may reproduce sexually. d. They may have flagella or cilia. a. All make cysts. What do tapeworms eat? a. red blood cells b. host tissues c. intestinal contents d. intestinal bacteria c. intestinal contents Parasitic helminths are distinguished from free-living helminths by all of the following EXCEPT