General microbiology week 7

c) Candida albicans

7/ Which of the following is MOST likely to cause an infection in HIV/AIDS patients? a) Giardia intestinalis b) Schistosoma mansoni c) Candida albicans d) Leishmania tropica

a) mycotoxins

8/ Many fungi produce ________ that can cause significant disease. a) mycotoxins b) chitinases c) cellulases d) endotoxins

a) Dimorphic fungi

9/ _______ exhibit yeast-like growth at human body temperatures and mold-like growth at room temperature a) Dimorphic fungi b) Slime molds c) Water molds d) Club fungi

True

6/ Most Human pathogenic fungi are nonmotile False True

d) inhalation

1/ The most common method of contracting a systemic mycosis is through __________. a) ingestion b) sexual contact c) person-to-person contact d) inhalation

a) secrete extracellular enzymes to breakdown nutrients

10/ Fungi __________. a) secrete extracellular enzymes to breakdown nutrients b) are procaryotic c) are photosynthetic d) have cell walls of peptidoglycan

d) dermatophytes

11/ Superficial mycoses are caused by a group of fungal pathogens called __________. a) dimorphic b) dermatologic c) dematiaceous d) dermatophytes

True

12/ Systemic fungal infections are difficult to treat because active antifungal drugs cause significant host toxicity. True False

a) mycelium

13/ What is the term used for the filamentous body found in many fungal species? a) mycelium b) gametophyte c) protonema d) dikaryote

d) Candida albicans

14/ Which of the following is considered an opportunistic pathogen? a) Toxoplasma gondii b) Plasmodium vivax c) Trichomoniasis vaginalis d) Candida albicans

Only (i.) is true.

15/ Fungi (i) are major causes of plant diseases. (ii) are pest organisms that have no commercial value Only (ii.) is true Neither (i.) or (ii.) are true Both (i.) and (ii.) are true Only (i.) is true.

a) cryptococcosis that develops in the lungs of a patient with HIV/AIDS

16/ Which of the following is an example of a secondary systemic mycosis? a) cryptococcosis that develops in the lungs of a patient with HIV/AIDS b) a Staphylococcus aureus infection on the surface of the skin c) amoebic dystentery, a gastrointestinal illness d) a ringworm infection of the scalp

c) superficial fungal infection.

17/ Athlete's foot is an example of a a) hypersensitivity reaction. b) superficial parasitic infection. c) superficial fungal infection. d) protozoal infection.

d) the presence of a chitinous cell wall

18/ Fungi can be distinguished from algae due to a) the presence of a visable nucleus b) The absence of mitochondria c) the presence of a cellulosic cell wall d) the presence of a chitinous cell wall

b) dimorphic

19/ Fungi that can grow in a yeast or a mold form depending on the conditions are termed __________. a) amphimorphic b) dimorphic c) morphic d) pleomorphic

b) systemic mycosis: Candida

2/ Which fungal genus is correctly matched to the class of disease it causes? a) superficial mycosis: Aspergillus b) systemic mycosis: Candida c) subcutaneous mycosis: Microsporum d) systemic mycosis: Sporothrix

b) a ringworm infection of the scalp

20/ Azole medications inhibit the production of ergosterols. Which infection would they be most effective against? a) a bacterial infection b) a ringworm infection of the scalp c) a tapeworm d) malaria

d) Zygomycota

21/ The bread mold Rhizopus stolonifer belongs to which of the following fungal divisions? a) Microsporidia b) Ascomycota c) Chytridiomycota d) Zygomycota

b) Glycogen

22/ Fungi usually store the reserve food material in the form of a) Starch b) Glycogen c) Protein d) Lipid

d) Basidiocarps

23/ The fruiting body of a mushroom is called a) Ascocarps b) Sorocarps c) Plasmodiocarps d) Basidiocarps

a) Histoplasma capsulatum

24/ Bat sites usually harbor the following primary pathogenic fungus: a) Histoplasma capsulatum b) Paracoccidioides brasiliensis c) Madurella mycetomatis d) Phaeoannellomyces werneckii

b) mycoses.

25/ ALL fungal infections can broadly be termed a) superficial. b) mycoses. c) benign. d) systemic.

c) It binds to ergosterol.

3/ Amphotericin B is an antifungal medication. What might its mechanism of action be? a) It binds to phospholipids in fungal membranes. b) It binds to ribosomes. c) It binds to ergosterol. d) It prevents synthesis of peptidoglycan cell walls

d) systemic mycoses.

4/ The MOST serious types of fungal infections are a) superficial mycoses. b) mycotoxic infections. c) subcutaneous infections. d) systemic mycoses.

c) a bread mold

5/ Which of these organisms has hyphae? a) a Staphylococcus aureus bacterium b) rotifers c) a bread mold d) an amoeboid protozoan