Chapter 12 MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question 1 Which of the following pairs is mismatched A dinoflagellates paralytic shellfish poisoning B red algae agar C brown algae algin D diatoms petroleum E green algae prokaryotic Answer E 2 Which of the following statements is FALSE A Fungal spores are for asexual or sexual reproduction B Fungal spores are highly resistant to heat and chemical agents C Fungi produce asexual spores D Fungal spores are used in identification of fungi E Fungi produce sexual spores Answer B 3 If a larva of Echinococcus granulosus is found in humans humans are the A reservoir B intermediate host C infected host D definitive host E None of the answers is correct Answer B 4 Below are paired items referring to the heartworm Dirofilaria immitis Which of the pairs is mismatched A dog sexual reproduction B mosquito definitive host C dog definitive host D mosquito vector E None of the pairs is mismatched Answer B 5 Which of the following statements about helminths is FALSE A Some have male and female reproductive organs in one animal B They have eukaryotic cells C They are multicellular animals D They are heterotrophic E All are parasites Answer E 1 6 Which of the following groups of algae does NOT produce compounds that are toxic to humans A red algae B green algae C dinoflagellates D diatoms E None of the answers is correct all of these groups of algae produce compounds toxic to humans Answer B 7 Which of the following arthropods does NOT transmit diseases by sucking blood from a human host A fleas B houseflies C mosquitoes D lice E kissing bugs Answer B 8 Seventeen patients in ten hospitals had cutaneous infections caused by Rhizopus In all seventeen patients Elastoplast bandages were placed over sterile gauze pads to cover wounds Fourteen of the patients had surgical wounds two had venous line insertion sites and one had a bite wound Lesions present when the bandages were removed ranged from vesiculopustular eruptions to ulcerations and skin necrosis requiring debridement Fungi are more likely than bacteria to contaminate bandages because they A prefer a neutral environment pH 7 B cannot tolerate high osmotic pressure C can tolerate low moisture conditions D are aerobic E have a fermentative metabolism Answer C 9 All of the following are characteristic of lichens EXCEPT A they are arranged in foliose fruticose or crustose morphologies B they are a symbiotic relationship of a fungus and a protozoan C they are a major food source for tundra herbivores D they are used as indicators of air pollution E they serve as primary producers in rocky ecosystems Answer B 10 Which of the following is the most effective control for malaria A vaccination B eliminate Anopheles C eliminate the intermediate host D treating patients E None of these is an effective control Answer B 2 11 Which of the following is a nucleated unicellular organism that if you changed the incubation temperature would form filaments with conidiospores A ascomycete B euglenozoa C plasmodial slime mold D tapeworm E cellular slime mold Answer A Table 12 1 1 Arthroconidium 2 Ascospore 3 Basidiospore 4 Blastoconidium 5 Chlamydoconidium 6 Conidiospore 7 Sporangiospore 8 Zygospore 12 In Table 12 1 which of these spores are asexual spores A 2 4 6 7 8 B 2 3 6 8 C 1 3 5 8 D 1 4 5 6 7 E All of the spores are asexual Answer D 13 In mid December a woman with insulin dependent diabetes who had been on prednisone fell and received an abrasion on the dorsal side of her right hand She was placed on penicillin By the end of January the ulcer had not healed and she was referred to a plastic surgeon On January 30 a swab of the wound was cultured at 35 C on blood agar On the same day a smear was made for Gram staining The Gram stain showed large 10 m cells Brownish waxy colonies grew on the blood agar Slide cultures set up on February 1 and incubated at 25 C showed septate hyphae and single conidia The most likely cause of the infection is a A yeast B gram negative bacterium C protozoan D parasitic alga E dimorphic fungus Answer E 14 Which of the following pairs is mismatched A Basidiomycota basidiospores B Ascomycota conidiospores C anamorphs lack spores D Zygomycota sporangiospores E microsporidia lack mitochondria Answer C 3 15 Which of the following organisms is photoautotrophic protozoan A Phytophthora B plasmodial slime mold C cellular slime mold D Euglena E oomycote Answer D 16 In the malaria parasite life cycle A humans are the intermediate host B mosquitoes are the definitive host C mosquitoes are the vector D humans are the intermediate host and mosquitos are the definitive host E humans are the intermediate host and mosquitoes are both the definitive host and the vector Answer E 17 Which of the following statements regarding protozoa is FALSE A Most protozoa reproduce asexually B Nearly all protozoa cause disease C Protozoa are common in water and soil D Protozoa are unicellular eukaryotes E Some protozoan pathogens are transmitted by arthropod vectors Answer B Table 12 1 1 Arthroconidium 2 Ascospore 3 Basidiospore 4 Blastoconidium 5 Chlamydoconidium 6 Conidiospore 7 Sporangiospore 8 Zygospore 18 In Table 12 1 which of these spores are characteristic of Rhizopus A 6 and 7 B 1 and 4 C 2 and 8 D 1 and 2 Answer E 19 Giardia and Trichomonas are unusual eukaryotes because they A lack nuclei B do not produce cysts C are motile D lack mitochondria E do produce cysts Answer D 20 Which of the following statements about the oomycote algae is FALSE A They have chlorophyll B They form hyphae C They produce zoospores in a sporangium D They reproduce sexually E They cause plant diseases Answer A 4 E 7 and 8 21 Which of the following statements regarding lichens is FALSE A The fungal partner provides a means of attachment and protects the algal partner from desiccation B The algal partner produces carbohydrates that are absorbed by the fungal partner C Lichens are often the first life form to colonize rock or soil D Lichens represent a mutualistic relationship between a fungus and an alga E Lichens are very tolerant to pollution Answer E 22 The encysted larva of the beef tapeworm is called a A metacercaria B redia C cysticercus D cercaria E proglottid Answer C 23 Which of the following pairs is mismatched A dermatomycosis fungal infection of the skin B systemic mycosis fungal infection of body organs C dimorphic fungus grows as a yeast or a mold D coenocytic