Characteristics of Fungi
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Questions and Answers

What type of ribosomes do fungi have in their cells?

  • 70S
  • 80S (correct)
  • 90S
  • 50S
  • Which statement best describes the nutrient acquisition method of fungi?

  • They absorb nutrients. (correct)
  • They use chemosynthesis.
  • They intake nutrients through phagocytosis.
  • They utilize photosynthesis.
  • What is the main structural component of the cell wall in most fungi?

  • Lignin
  • Cellulose
  • Chitin (correct)
  • Pectin
  • Which of the following is a form of fungi that is unicellular and reproduces by budding?

    <p>Yeasts</p> Signup and view all the answers

    Which of the following temperature conditions is suitable for the growth of most fungi?

    <p>28°C</p> Signup and view all the answers

    What type of fungi can have melanized cell walls containing pigments?

    <p>Osmotrophs</p> Signup and view all the answers

    Which component in fungal membranes is targeted by many antifungal drugs like azoles?

    <p>Ergosterol</p> Signup and view all the answers

    Fungi that obtain energy from breaking down dead matter are classified as what?

    <p>Saprophytes</p> Signup and view all the answers

    What type of nutritional strategy involves fungi requiring organic compounds for both carbon and energy sources?

    <p>Chemoheterotrophs</p> Signup and view all the answers

    Which statement accurately describes most fungi regarding their relationship with other organisms?

    <p>They are facultative parasites.</p> Signup and view all the answers

    Study Notes

    Characteristics of Fungi

    • Fungi are eukaryotic, meaning their cells contain membrane-bound organelles such as nuclei, mitochondria, and Golgi apparatus.
    • They are heterotrophic, obtaining energy by breaking down dead or decaying matter, forming symbiotic relationships, or infecting other organisms.
    • Fungi are chemoheterotrophs, requiring organic compounds for both carbon and energy sources, and lack chlorophyll.
    • Their cell walls are rigid and made of chitin, except for lower fungi which have cell walls made of cellulose.
    • Fungal membranes contain ergosterols, a site of action for many antifungal drugs such as azoles.

    Cell Wall and Pigments

    • Some fungi have melanized cell walls with brown or black pigments.

    Motility and Structure

    • Fungi are non-motile, except for lower fungi.
    • They can be unicellular (yeasts) or multicellular (molds).
    • Yeasts reproduce by budding, while molds consist of thread-like structures called hyphae that form a mat-like structure called mycelium.

    Nutrition and Growth

    • Fungi obtain their nutrients by absorption (osmotrophic).
    • They grow best in slightly acidic conditions (pH 5-6.5).
    • Fungi can grow in high salt and sugar conditions, and are osmophilic, meaning they thrive in high osmotic environments.
    • Most fungi grow at temperatures around 28°C, except for pathogenic fungi which grow at 37°C.

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    Description

    Learn about the general characteristics of fungi, including their cell structure, nutrition, and relationships with other organisms.

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