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Biology LibreTexts

8.E: Fungi (Exercises)

 

These are homework exercises to accompany Kaiser's "Microbiology" TextMap. Microbiology is the study of microorganisms, which are defined as any microscopic organism that comprises either a single cell (unicellular), cell clusters or no cell at all (acellular). This includes eukaryotes, such as fungi and protists, and prokaryotes. Viruses and prions, though not strictly classed as living organisms, are also studied.

8.1: Overview of Fungi

Study the material in this section and then write out the answers to these questions. Do not just click on the answers and write them out. This will not test your understanding of this tutorial.

  1. A fungal infection is termed a _________________. (ans)

8.2: Yeasts

Questions

Study the material in this section and then write out the answers to these questions. Do not just click on the answers and write them out. This will not test your understanding of this tutorial.

  1. Briefly describe a typical yeast and state how it reproduces asexually. (ans)
  2. Match the following:

    _____ Reproductive spores produced by yeast by budding. (ans)

    _____ Thick walled survival spores produced by the yeast Candida. (ans)

    _____Long, continuous fungal filaments produced by dimorphic yeast. (ans)

    1. hyphae
    2. blastoconidia (blastospores)
    3. chlamydoconidia (chlamydospores)
  3. Name 3 potentially pathogenic yeasts and state an infection each causes.
    1. (ans)
    2. (ans)
    3. (ans)
  4. Multiple Choice (ans)

8.3: Molds

Questions

Study the material in this section and then write out the answers to these questions. Do not just click on the answers and write them out. This will not test your understanding of this tutorial.

  1. Define mold. (ans)
  2. Match the following:

    _____ The hyphae that grow up in the air and produce asexual reproductive spores. (ans)

    _____ Large asexual reproductive mold spores coming of of vegetative hyphae and often produced by dermatophytes. (ans)

    _____ Asexual reproductive mold spores produced inside a sac or sporangium at the end of an aerial hypha. (ans)

    _____ The hyphae that anchor a mold and absorb nutrients. (ans)

    _____ Asexual reproductive mold spores produced in chains at the end of an aerial hypha. (ans)

    _____ A branching tubular structure of a mold that is usually divided into cell-like units by crosswalls called septa. (ans)

    _____ Asexual reproductive mold spores produced by fragmentation of vegetative hyphae. (ans)

    1. hypha
    2. macroconidia
    3. vegetative mycelium
    4. aerial mycelium
    5. sporangiospores
    6. arthrospores
    7. conidiospores
  3. Define dermatophyte. (ans)
  4. List 2 genera of dermatophytes.
    1. (ans)
    2. (ans)
  5. Name 3 dermatophytic infections. (ans)
  6. Describe what is meant by the term "dimorphic fungus", name 2 systemic infections caused by dimorphic fungi, and state how they are initially contracted. (ans)
  7. Multiple Choice (ans)

8.4: Fungal Pathogenicity

Exercise

  1. Name at least 3 fungal virulence factors that promote fungal colonization.
    1. (ans)
    2. (ans)
    3. (ans)
  2. Name 2 fungal virulence factors that damage the host.
    1. (ans)
    2. (ans)

8.5: Chemotherapeutic Control of Fungi

Study the material in this section and then write out the answers to these questions. Do not just click on the answers and write them out. This will not test your understanding of this tutorial.

  1. Briefly describe 2 different ways antifungal chemotherapeutic agents may affect fungi and give an example of an antibiotic for each way.
    1. (ans)
    2. (ans)