MIC 541-Exam 5-Mycology 9

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kyleannkelsey
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MIC 541-Exam 5-Mycology 9
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2013-05-08 10:53:44
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MIC 541 Exam Mycology
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MIC 541-Exam 5-Mycology 9
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  1. Where are Fungi found in nature?
    Ubiquitous
  2. Are most fungi detrimental or beneficial?
    Beneficial
  3. What are examples of the usefulness of fungi?
    • Degrade organic debris
    • Breads/cheese
    • Beer/wine
    • Pharmacological agents
  4. What other group of organisms do Fungi have the most in common with?
    Animals
  5. What characteristics do fungi share with animals?
    • Eukaryotic
    • Heterotrophic
  6. What type of cells do fungi have?
    Eukaryotic
  7. What type of metabolism do Fungi have?
    Heterotrophic
  8. Define fungus:
    • A heterotrophic, eukaryotic organism that does not contain chlorophyll
    • Obtains food by absorption
    • Reproduces via spores
  9. What is the primary carbohydrate storage molecule of fungi?
    Glycogen
  10. Describe the morphology of a fungus:
    Thalus composed of hyphae that elongate from the tip
  11. Describe the diversity of fungi:
    Second most diverse group (second to insects)
  12. When did fungi first appear on earth?
    • ~1 billion years ago
    • Before vascular plants and animals
  13. What percent of plant diseases are fungi?
    70%
  14. How many species of fungi exist?
    • 80,000 currently
    • 1,700 new per year
  15. Do fungi have locomotion structures?
    No
  16. What do fungi have in their cell membranes?
    Sterols
  17. Do fungi have adherence structures?
    Few
  18. How many species of fungi are associated with human diseases?
    300 species
  19. What are normal flora fungi?
    • Candida
    • Malassezia
  20. Where are pathogenic fungi found?
    In the environment
  21. Do fungi have cell walls?
    Yes
  22. What are the cell walls of fungi made of?
    Chitin
  23. What is Chitin?
    The cell wall component of Fungi made of a NAG polymers
  24. Do fungi have capsules?
    Sometimes
  25. What are capsules for fungi made of?
    • Polysaccharide (mannans and glucans)
    • Complexed with proteins
  26. What are the two classifications of Fungi?
    • Yeasts
    • Molds
  27. What is the shape of a yeast cell?
    Round or oval/Single celled
  28. What is the shape of a mold cell?
    Filamentous/multicellular
  29. How do molds reproduce?
    Sexually and asexually via spores
  30. What is a mass of mold filiments called?
    Mycelium
  31. Wht is a mycelium?
    A mass of mold filiments
  32. What is a dimorphic fungi?
    One that can exist as a mold or a yeast
  33. What temperature do dimorphic fungi grow at in hyphae form?
    25 degrees C
  34. What temperature do dimorphic fungi grow at in yeasts form?
    37 degrees C
  35. What examples of dimorphic fungi were given in class?
    • Blastomyces
    • Coccidiodes
    • Histoplasma
  36. What type of fungi are Blastomyces, Coccidomyces and Histoplasma?
    Dimorphic yeast
  37. What are the four methods of reproduction for fungi?
    • Fission
    • Budding
    • Fragmentation
    • Spore formation
  38. What is the method reproduction for molds?
    Spore formation
  39. What is the main method of reproduction for yeasts?
    Budding
  40. What is fragmentation?
    A method of reproduction for a hypha, where the hyphae breaks apart
  41. Is pathogenicity of fungi a necessity for maintenance?
    No, pathogenicity is not needed for most fungi

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