Ch 12 Micro

Which of the following statements about fungi is false?
A) All fungi are unicellular.
B) Fungi are heterotrophic.
C) All fungi have eukaryotic cells.
D) Few fungi are pathogenic to humans.
E) Most fungi are aerobic.

Which of the following statements about helminths is false?
A) They have eukaryotic cells.
B) All are parasites.
C) They are heterotrophic.
D) Some have male and female reproductive organs in one animal.
E) They are multicellular animals.

Which of the following statements about the Oomycote algae is false?
A) They produce zoospores in a sporangium.
B) They have chlorophyll.
C) They form hyphae.
D) They reproduce sexually.
E) They cause plant diseases.

Seventeen patients in ten hospitals had cutaneous infections caused by Rhizopus. In all 17 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
A) They can tolerate low-moisture conditions.
B) They prefer a neutral environment (pH 7).
C) They are aerobic.
D) They have a fermentative metabolism.
E) They cannot tolerate high osmotic pressure.

Which of the following statements is false?
A) In a lichen, the fungus provides the holdfast.
B) Lichens are parasites.
C) In a lichen, the alga produces carbohydrates.
D) Lichens are important soil producers.
E) A lichen doesn't exist if the fungal and algal partners are separated.

Which of the following pairs is mismatched?
A) Anamorph – produces asexual spores
B) Plasmogamy – union of two haploid cells
C) Karyogamy – fusion of nucleus
D) Meiosis – cell division resulting in haploid cells
E) Deuteromycota – a phylum of fungi

1-Arthroconidium   2-Ascospore  3-Basidiospore  4-Blastoconidium  5-Chlamydoconidium  6-Conidiospore  7-Sporangiospore  8-Zygospore
In Table 12.1, which of these spores are characteristic of Penicillium?
A) 4 and 6
B) 2 and 6
C) 1 and 2
D) 3 and 4
E) 1 and 4

1-Arthroconidium   2-Ascospore  3-Basidiospore  4-Blastoconidium  5-Chlamydoconidium  6-Conidiospore  7-Sporangiospore  8-Zygospore
In Table 12.1, which of these spores are characteristic of Rhizopus?
A) 2 and 8
B) 6 and 7
C) 1 and 4
D) 1 and 2
E) 7 and 8

1-Arthroconidium   2-Ascospore  3-Basidiospore  4-Blastoconidium  5-Chlamydoconidium  6-Conidiospore  7-Sporangiospore  8-Zygospore
In Table 12.1, which spore is in a sac and results from the fusion of two nuclei from different strains of the same fungi?
A) 4
B) 2
C) 8
D) 1
E) 6

1-Arthroconidium   2-Ascospore  3-Basidiospore  4-Blastoconidium  5-Chlamydoconidium  6-Conidiospore  7-Sporangiospore  8-Zygospore
In Table 12.1, which spore is found externally on a pedestal?
A) 3
B) 7
C) 5
D) None
E) 1

1-Arthroconidium   2-Ascospore  3-Basidiospore  4-Blastoconidium  5-Chlamydoconidium  6-Conidiospore  7-Sporangiospore  8-Zygospore
In Table 12.1, which is a thick-walled spore formed as a segment within a hypha?
A) 1
B) 7
C) 5
D) 3
E) None

1-Arthroconidium   2-Ascospore  3-Basidiospore  4-Blastoconidium  5-Chlamydoconidium  6-Conidiospore  7-Sporangiospore  8-Zygospore
In Table 12.1, which of these spores are asexual spores?
A) 2, 3, 6, 8
B) 1, 3, 5, 8
C) 1, 4, 5, 6, 7
D) 2, 4, 6, 7, 8
E) All

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 µm) 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) Protozoan.
B) Gram-negative bacterium.
C) Yeast.
D) Parasitic alga.
E) Dimorphic fungus.

Which of the following tends to be more complex in a parasitic helminth than in free-living helminths?
A) Digestive system
B) Nervous system
C) Locomotion
D) Reproductive system
E) All of the above are more complex in a parasitic helminth.

Which of the following statements is false?
A) Fungi produce asexual spores.
B) Fungal spores are for reproduction.
C) Fungi produce sexual spores.
D) Fungal spores are resting spores to protect the fungus from adverse environmental conditions.
E) Fungal spores are used in identification of fungi.

 Which of the following pairs are mismatched? 1. Arthroconidium – formed by fragmentation 2. Sporangiospore – formed within hyphae 3. Conidiospore – formed in a chain 4. Blastoconidium – formed from a bud 5. Chlamydoconidium – formed in a sac
A) 4 and 5
B) 3 and 4
C) 2 and 3
D) 1 and 2
E) 2 and 5

Which of the following pairs is mismatched?
A) Brown algae – algin
B) Dinoflagellates – paralytic shellfish poisoning
C) Red algae – agar
D) Diatoms – petroleum
E) Green algae – prokaryotic

Helminthic diseases are usually transmitted to humans by
A) Genitourinary route.
B) Vectors.
C) Respiratory route.
D) Aerosols.
E) Gastrointestinal route.

Which of the following is NOT a characteristic of parasitic platyhelminths?
A) They are multicellular animals.
B) They are dorsoventrally flattened.
C) They can be divided into flukes and tapeworms.
D) They have a complete digestive system.
E) They are hermaphroditic.

Cercariae, metacercaria, miracidia, and rediae are stages in the life cycle of
A) Trematodes.
B) Cestodes.
C) Nematodes.
D) Sarcodina.
E) Sporozoans.

Which stage immediately precedes the adult?
A) Metacercaria
B) Proglottid
C) Redia
D) Miracidium
E) Cercaria

The encysted larva of the beef tapeworm is called a
A) Cysticercus.
B) Metacercaria.
C) Redia.
D) Cercaria.
E) Proglottid

Which of the following arthropods does NOT transmit diseases by sucking blood from a human host?
A) Mosquitoes
B) Fleas
C) Lice
D) Houseflies
E) Kissing bugs

Which of the following statements about algae is false?
A) They use CO2 as their carbon source.
B) They use light as their energy source.
C) Some are capable of sexual reproduction
D) All are unicellular.
E) They produce oxygen from hydrolysis of water.

Below are several paired items referring to the heartworm Dirofilaria immitis. Which of the pairs is mismatched?
A) Dog – definitive host
B) Dog – sexual reproduction
C) Mosquito – vector
D) Mosquito – definitive host
E) All of the above are correctly matched.

All algae are
A) Photoautotrophs.
B) Plants.
C) Unicellular.
D) Toxic.
E) None of the above.

 A definitive host harbors which stage of a parasite?
A) Miracidium
B) Cyst
C) Adult
D) Larva
E) All of the above

What do tapeworms eat?
A) Intestinal bacteria
B) Intestinal contents
C) Red blood cells
D) Host tissues
E) Plant matter

The microspora and archaezoa are unusual eukaryotes because they
A) Lack mitochondria.
B) Are motile.
C) Don't produce cysts.
D) Lack nuclei.
E) Do produce cysts.

The life cycle of the fish tapeworm is similar to that of the beef tapeworm. Which of the following is the most effective preventive measure?
A) Cooking fish before eating
B) Salting fish before eating
C) Refrigerating stored fish
D) Wearing gloves while handling fish
E) Not swimming in fish-infested waters

Which of the following is the most effective control for malaria?
A) Vaccination
B) Treating patients
C) Eliminate Anopheles
D) Eliminate the intermediate host
E) None of the above is an effective control.

Multinucleated amoebalike cells that produce funguslike spores.
A) Cellular slime mold
B) Ascomycete
C) Plasmodial slime mold
D) Euglenozoa
E) Tapeworm

Amoebalike vegetative structures that produce sporangia.
A) Euglenozoa
B) Plasmodial slime mold
C) Ascomycete
D) Tapeworm
E) Cellular slime mold

A multicellular organism; the digestive tract has one opening.
A) Tapeworm
B) Plasmodial slime mold
C) Cellular slime mold
D) Euglenozoa
E) Ascomycete

A nucleated, unicellular organism; when you change the incubation temperature, it forms filaments with conidiospores.
A) Tapeworm
B) Euglenozoa
C) Cellular slime mold
D) Ascomycete
E) Plasmodial slime mold

An organism that can grow photoautotrophically in the light and chemoheterotrophically in the dark.
A) Euglena
B) Phytophthora
C) Cellular slime mold
D) Plasmodial slime mold
E) Oomycote

Which of the following pairs is mismatched?
A) Tick – Rocky Mountain spotted fever
B) Mosquito – encephalitis
C) Mosquito – Pneumocystis
D) Mosquito – malaria
E) Tick – Lyme disease

Which of the following groups of algae does NOT produce compounds that are toxic to humans?
A) Diatoms
B) Dinoflagellates
C) Green algae
D) Red algae
E) All of the above produce compounds toxic to humans.

The cells of plasmodial slime molds can grow to several centimeters in diameter because
A) They have organelles.
B) They distribute nutrients by cytoplasmic streaming.
C) The large surface can absorb nutrients.
D) They form spores.
E) None of the above.

Assume you have isolated a multicellular heterotrophic organism that produces coenocytic hyphae, motile zoospores, and cellulose cell walls. It is most likely a(n)
A) Ascomycete fungus.
B) Zygomycete fungus.
C) Green alga.
D) Oomycote alga.
E) Tapeworm.

If a larva of Echinococcus granulosus is found in humans, humans are the
A) Definitive host.
B) Infected host.
C) Intermediate host.
D) Reservoir.
E) None of the above

Ringworm is caused by a(n)
A) Protozoan.
B) Cestode.
C) Ascomycete.
D) Trematode.
E) Nematode.

Yeast infections are caused by
A) Penicillium.
B) Aspergillus.
C) Histoplasma.
D) Saccharomyces cerevisiae.
E) Candida albicans.

In a food chain consisting of the following organisms, which acts as a producer?
A) Slime molds
B) Fungi
C) Protozoa
D) Lichens

You see acid-fast oocysts in a fecal sample from a patient who has diarrhea. What is the most likely cause?
A) Giardia
B) Diatoms
C) Cryptosporidium
D) Taenia
E) Entamoeba