MCB2010 TEST 2 Questions with Complete Solutions 100% Solved| Grade A+
56) Which of the following statements regarding fungi is FALSE?
A) Most fungi are pathogenic for humans.
B) Fungi are eukaryotic heterotrophs.
C) Fungi reproduce by forming asexual or sexual spores.
D) Most fungi grow well in acidic culture condition.
E) Fungi tolerate low moisture conditions. A
57) Which of the following statements about helminths is FALSE?
A) They are heterotrophic.
B) They are multicellular animals.
C) They have eukaryotic cells.
D) All are parasites.
E) Some have male and female reproductive organs in one animal. D
58) Which of the following statements about the oomycote algae is FALSE?
A) They form hyphae.
B) They produce zoospores in a sporangium.
C) They cause plant diseases.
D) They have chlorophyll.
E) They reproduce sexually. D
59) 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) are aerobic.
,B) can tolerate low-moisture conditions.
C) prefer a neutral environment (pH 7).
D) have a fermentative metabolism.
E) cannot tolerate high osmotic pressure. B
60) Which of the following statements regarding lichens is FALSE?
A) Lichens are a mutualistic relationship between a fungus and a protozoan.
B) Lichens represent a mutualistic relationship between a fungus and an alga.
C) Lichens are often the first life form to colonize rock or soil.
D) The algal partner produces carbohydrates that are absorbed by the fungal partner.
E) The fungal partner provides a means of attachment and protects the algal partner from
desiccation. A
61) Which of the following pairs is mismatched?
A) Basidiomycota — basidiospores
B) Ascomycota — conidiospores
C) Zygomycota — sporangiospores
D) microsporidia — lack mitochondria
E) anamorphs — lack spores E
Table 12.1
1-Arthroconidium 5-Chlamydoconidium
2-Ascospore 6-Conidiospore
3-Basidiospore 7-Sporangiospore
4-Blastoconidium 8-Zygospore
62) In Table 12.1, which of these spores are characteristic of Penicillium?
A) 1 and 2
,B) 3 and 4
C) 2 and 6
D) 1 and 4
E) 4 and 6 C
63) In Table 12.1, which of these spores are characteristic of Rhizopus?
A) 1 and 2
B) 6 and 7
C) 2 and 8
D) 1 and 4
E) 7 and 8 E
64) In Table 12.1, which is a thick-walled spore formed as a segment within a hypha?
A) 1
B) 3
C) 5
D) 7
E) None of the answers is correct. B
65) In Table 12.1, which of these spores are asexual spores?
A) 1, 4, 5, 6, 7
B) 2, 3, 6, 8
C) 1, 3, 5, 8
D) 2, 4, 6, 7, 8
E) All of the spores are asexual. A
66) Which of the following pairs is mismatched?
, A) teleomorph — produces both sexual and asexual spores
B) dermatomycosis — fungal infection of the skin
C) dimorphic fungus — grows as a yeast or a mold
D) systemic mycosis — fungal infection of body organs
E) coenocytic hyphae — hyphae with cross-walls E
67) Which of the following statements regarding protozoa is FALSE?
A) Protozoa are unicellular eukaryotes.
B) Nearly all protozoa cause disease.
C) Most protozoa reproduce asexually.
D) Protozoa are common in water and soil.
E) Some protozoan pathogens are transmitted by arthropod vectors. B
68) 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) gram-negative bacterium.
B) dimorphic fungus.
C) parasitic alga.
D) yeast.
E) protozoan. B
69) Which of the following tends to be more complex in a parasitic helminth than in free-living
helminths?
A) digestive system
56) Which of the following statements regarding fungi is FALSE?
A) Most fungi are pathogenic for humans.
B) Fungi are eukaryotic heterotrophs.
C) Fungi reproduce by forming asexual or sexual spores.
D) Most fungi grow well in acidic culture condition.
E) Fungi tolerate low moisture conditions. A
57) Which of the following statements about helminths is FALSE?
A) They are heterotrophic.
B) They are multicellular animals.
C) They have eukaryotic cells.
D) All are parasites.
E) Some have male and female reproductive organs in one animal. D
58) Which of the following statements about the oomycote algae is FALSE?
A) They form hyphae.
B) They produce zoospores in a sporangium.
C) They cause plant diseases.
D) They have chlorophyll.
E) They reproduce sexually. D
59) 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) are aerobic.
,B) can tolerate low-moisture conditions.
C) prefer a neutral environment (pH 7).
D) have a fermentative metabolism.
E) cannot tolerate high osmotic pressure. B
60) Which of the following statements regarding lichens is FALSE?
A) Lichens are a mutualistic relationship between a fungus and a protozoan.
B) Lichens represent a mutualistic relationship between a fungus and an alga.
C) Lichens are often the first life form to colonize rock or soil.
D) The algal partner produces carbohydrates that are absorbed by the fungal partner.
E) The fungal partner provides a means of attachment and protects the algal partner from
desiccation. A
61) Which of the following pairs is mismatched?
A) Basidiomycota — basidiospores
B) Ascomycota — conidiospores
C) Zygomycota — sporangiospores
D) microsporidia — lack mitochondria
E) anamorphs — lack spores E
Table 12.1
1-Arthroconidium 5-Chlamydoconidium
2-Ascospore 6-Conidiospore
3-Basidiospore 7-Sporangiospore
4-Blastoconidium 8-Zygospore
62) In Table 12.1, which of these spores are characteristic of Penicillium?
A) 1 and 2
,B) 3 and 4
C) 2 and 6
D) 1 and 4
E) 4 and 6 C
63) In Table 12.1, which of these spores are characteristic of Rhizopus?
A) 1 and 2
B) 6 and 7
C) 2 and 8
D) 1 and 4
E) 7 and 8 E
64) In Table 12.1, which is a thick-walled spore formed as a segment within a hypha?
A) 1
B) 3
C) 5
D) 7
E) None of the answers is correct. B
65) In Table 12.1, which of these spores are asexual spores?
A) 1, 4, 5, 6, 7
B) 2, 3, 6, 8
C) 1, 3, 5, 8
D) 2, 4, 6, 7, 8
E) All of the spores are asexual. A
66) Which of the following pairs is mismatched?
, A) teleomorph — produces both sexual and asexual spores
B) dermatomycosis — fungal infection of the skin
C) dimorphic fungus — grows as a yeast or a mold
D) systemic mycosis — fungal infection of body organs
E) coenocytic hyphae — hyphae with cross-walls E
67) Which of the following statements regarding protozoa is FALSE?
A) Protozoa are unicellular eukaryotes.
B) Nearly all protozoa cause disease.
C) Most protozoa reproduce asexually.
D) Protozoa are common in water and soil.
E) Some protozoan pathogens are transmitted by arthropod vectors. B
68) 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) gram-negative bacterium.
B) dimorphic fungus.
C) parasitic alga.
D) yeast.
E) protozoan. B
69) Which of the following tends to be more complex in a parasitic helminth than in free-living
helminths?
A) digestive system
