Fungi

Question 1

Characteristics

Answer 1

Aerobic or facultative anaerobic (fermentation)
Grow between 20-40°C
Heterotrophic-secrete enzymes to decompose organic matter
Viable with little water and harsh conditions

Question 2

Mycorrhizae

Answer 2

Combination of living roots and fungi

Question 3

Culture on:

Answer 3

Sabourand-dextrose agar (SDA)

Low pH inhibits bacterial growth

Question 4

Cell wall/membrane made with

Answer 4

Chitin/Ergosterol

Question 5

Ergosterol targeted by chemotherapy because:

Answer 5

Fungi and human cells so similar that chemotherapy drugs can affect both fungi and humans

Question 6

Characteristics of fungi - mold

Answer 6

Mycelium- whole body of mold

Hyphae- thread like cells that make up filaments of the body

Question 7

Characteristics of fungi- yeast

Answer 7

Single cells(microscopic)
Non-filamentous
Reprice by budding
Pseudohypae- long chain of buds

Question 8

Characteristics of fungi- dimorphic

Answer 8

Two forms
Can form mold or yeast depending on temp
37°C grows like yeast
25°C grows like mold
(Pathogenic)

Question 9

Fungal life cycle: sexual spores

Answer 9

Used to classify fungi

Question 10

Zygomycota

Answer 10

Sexual reproduction by gametes form a zygospore

Question 11

Ascomycota

Answer 11

Sexual reproduction in a sac called ascus, produce ascospores

Question 12

Imperfect fungi (deuteromycota)

Answer 12

Sexual reproduction not recognizable
Most pathogenic fungi

Athletes foot, ring worm

Question 13

Sporangiospores

Answer 13

Spores enclosed in a sac

Rhizopus

Question 14

Condida

Answer 14

Spores not exposed in a sac

Penicillium, aspergillis

Question 15

Economic impact

Answer 15

Original producers of antibiotic
Greatest Spiller of food
Fermentation

Question 16

Mycotic disease

Answer 16

Hypersensitive - allergic reaction
Mycotoxicosis - toxin released to environment
Aspergillis flavus releases aflatoxin (livestock grain)
Mycetismus - mushroom poisoning

Question 17

Mycosis infection

Answer 17

Cutaneous - ringworm, yeast infection
-inflammation, degrade keratin in skin, nails and hair

Subcutaneous - porothrix (rose thorns)
-uncerated skin lesions or fungating masses (lower extremities)

Systemic - histoplasmosis and coccidiomycosis
- viscera (lungs or other organs)