Fundamentals of mycology

Question 1

True of fungi

A. A septate mycelium is one in which no fruiting bodies are formed
B. Arthrospores and blastospores are formed by fungi in the telomorph stage
C. Chitin is a component of the fungal cell wall
D. Yeast produce mainly by conidia

Answer 1

C

Question 2

Which of the following are true of fungi?

A. Septate fungi are seen in ascomycota, basidiomycota, and zygomycota
B. Mushrooms are found in ascomycota
C. Most fungi are saprophytes, feeding on dead or decaying organic matter
D. Fungi are prokaryotes consisting of intertwined filaments of cells

Answer 2

C

Question 3

Statement A: Aflatoxins are produced by Aspergillus fumigatus

Statement B: Grains, peanuts, and other agricultural products can be infected by fungi that produces aflatoxins

A. Statement A is correct
B. Statement B is correct
C. Both statements are correct
D. Both statements are wrong

Answer 3

*

Question 4

True of fungi

A. Fungi are autotrophs
B. Dimorphic fungi can switch forms when induced by different water concentrations
C. Fungi are obligate anaerobes
D. Fungi can be grown in high carbohydrate media
E. Fungi grow best at 25C, close to room temperature

Answer 4

E

Question 5

True of dermatophytosis

A. Resistant to antibiotics
B. Involves the hair, skin, and nails
C. Spreads to other organs
D. Accompanies predisposing conditions

Answer 5

*

Question 6

Tinea diseases are dermatophytoses caused by a group of fungi. Which of the following is not a dermatophyte?

A. Trichophyton
B. Microsporum
C. Epidermophyton
D. Emmonsiella

Answer 6

*

Question 7

Ringworm infection of the scalp, eyebrows, and eyelashes

A. Tinea capitis
B. Tinea cruris
C. Tinea pedis
D. Tinea versicolor
E. White piedra

Answer 7

A

Question 8

Madura’s foot

A. Sporotrichosis
B. Chromoblastomycosis
C. Phaeomycosis
D. Mycotic mycetoma

Answer 8

*

Question 9

Rose gardener’s disease

A. Sporotrichosis
B. Chromoblastomycosis
C. Phaeomycosis
D. Mycotic mycetoma

Answer 9

*

Question 10

Draining sinuses, soft or hard granules, and tumefaction of the bone are the triad of symptoms

A. Sporotrichosis
B. Chromoblastomycosis
C. Phaeomycosis
D. Mycotic mycetoma

Answer 10

*

Question 11

Planate dividing scleroting bodies are also called “brown fission bodies” or “copper pennies” are seen microscopically

A. Sporotrichosis
B. Chromoblastomycosis
C. Phaeomycosis
D. Mycotic mycetoma

Answer 11

*

Question 12

Common fungal smear used because of ability to dissolve keratin

A. 10% KOH
B. Lactophenol blue
C. PAS
D. India ink

Answer 12

A

Question 13

Which of the following is a mass of intertwined hypal elements?

A. Mycelium
B. Rhizoids
C. Conidia
D. Arthrospora

Answer 13

A

Question 14

What is the culture media used in the primary isolation of dermatophytes?

A. SDA
B. Nutrient agar
C. BHI agar
D. MacConkey agar

Answer 14

*

Question 15

Environmental form of dimorphic fungi

A. Yeast
B. Mold
C. Both
D. Neither

Answer 15

B

Question 16

Difference between mold and yeast?

a. Parasitic phase is mold phase.
b. Yeast are single-celled and reproduce by budding.
c. Both have pseudohyphase and blastoconidia.
d. Molds are filamentous and grow by branching pseudohyphae.

Answer 16

B

Question 17

Which of the following situations that allow fungal microogranisms to be introduced into the host would not result in dermatophyte infection?

a. Playing with cat
b. Playing in soil
c. Inhailing conidia
d. Walking on soil
e. Sharing a towel

Answer 17

C

Question 18

Dermatophyte infection

a. No chronic
b. Keratinized
c. Diffused alveolar

Answer 18

C

Question 19

Which fungal elements is not normally found in the host’s body?

a. Reproductive mycelium
b. Vegetative
c. Yeast
d. Cyst

Answer 19

A

Question 20

A mass of intertwined hyphal elements is called a mycelium. T/F

Answer 20

T

Question 21

Conidia are specialized nonmotile structures with asexual spores (formed from?) hyphal wall. T/F

Answer 21

T

Question 22

Fungi can also have sexual sporulation. T/F

Answer 22

T

Question 23

Asexual fungi are medically significant fungi. T/F

Answer 23

T

Question 24

Dimorphic fungus exist as yeast during sapropobic phase. T/F

Answer 24

F

Question 25

The aerial mycelia is used for nutrition. T/F

Answer 25

T/F

Question 26

In general, all of the following are characteristics of fungi EXCEPT

A. distinct nucleus 
B. cytoplasmic organelles with membranes 
C. chitin as major polysaccharide 
D. ALL of the above
E. NONE of the above

Answer 26

E

Question 27

The aerial mycelium is for

A. Reproduction
B. Nutrition
C. Anchor
D. Osmosis

Answer 27

A

Question 28

What do you rarely not see…

A. Reproductive
B. Vegetative
C. Both
D. Neither

Answer 28

B

Question 29

Mass of hyphae

A. Rhizoid
B. Mycelium
C. Arthrospores
D. Zygospores

Answer 29

B

Question 30

Primary isolation culture media for dermatophytes

A. SDA
B. BHI
C. Nutrient Agar
D. MacConkey Agar

Answer 30

A

Question 31

Which of the following is the most common cause of disease in hairshaft

A. pytiriasis versicolor
B. piedra nigra
C. tinea pedis
D. tinea nigra

Answer 31

B

Question 32

In general, KOH of skin scrapings for Malassezia will show

A. yeast budding
B. hyphae filaments
C. both A and B
D. neither A and B

Answer 32

C

Question 33

Subcutaneous mycoses are seen worldwide and the organisms are soil saprophytes. Which of the following routes will these agents of SQ mycoses be introduced to the host?

A. Ingestion
B. Inhalation of spore
C. Traumatic implantation
D. Inhalation of conidia

Answer 33

C

Question 34

All of the following spores are asexual except:

A. Blastospores
B. Conidiospores
C. Zygospores
D. Sporangiospores

Answer 34

C

Question 35

Yeasts are ____________organisms; Molds are __________organisms

A. microscopic; microscopic
B. unicellular; filamentous
C. motile; non motile
D. water; terrestrial

Answer 35

B

Question 36

The most appropriate mounting medium used in viewing fungi

A. PAS
B. KOH
C. India ink
D. LPCB

Answer 36

B