Eukaryotic Microbes Quiz
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Questions and Answers

What is the primary process by which algae produce energy?

  • Fermentation
  • Photosynthesis (correct)
  • Chemosynthesis
  • Cellular respiration

    • Which of the following is a characteristic of protozoa?

  • They store energy as starch
  • They have cell walls containing cellulose
  • They are photosynthetic organisms
  • Most are unicellular and free-living (correct)

    • Which group of microbes is primarily associated with toxic substances that can affect humans?

  • Protozoa
  • Bacteria
  • Algae (correct)
  • Fungi

    • What are phycotoxins primarily produced by?

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

    Which of the following symptoms is associated with paralytic shellfish poisoning?

    <p>Numbness and tingling</p> Signup and view all the answers

    What classification is used for algae based on their pigments?

    <p>Green, Golden, Brown, or Red</p> Signup and view all the answers

    What is the genus of algae that is known for causing human infections?

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

    Which of the following is NOT a characteristic feature of algae?

    <p>Always multicellular</p> Signup and view all the answers

    What is the study of fungi called?

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

    Which polysaccharide is found in fungal cell walls?

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

    What term describes the mass formed by intertwining hyphae?

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

    Which of the following fungi are noted for having no known mode of sexual reproduction?

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

    Which of the following descriptions is true regarding dimorphic fungi?

    <p>They can switch forms based on temperature conditions.</p> Signup and view all the answers

    Which fungal disease is caused by Histoplasma Capsulatum?

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

    Which type of spores are also referred to as conidia?

    <p>Asexual Spores</p> Signup and view all the answers

    Which of the following organisms is classified as a yeast?

    <p>Candida Albicans</p> Signup and view all the answers

    What is the primary characteristic of protozoa in regard to their cell structure?

    <p>They possess a thickened pellicle for protection.</p> Signup and view all the answers

    What stage of the protozoan life cycle is responsible for feeding and division?

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

    Which type of protozoa utilizes pseudopodia for movement?

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

    What is a common symptom associated with dysentery caused by Entamoeba histolytica?

    <p>Diarrhea containing mucus and/or blood.</p> Signup and view all the answers

    Which protozoan is recognized as the only ciliate known to infect humans?

    <p>Balantidium coli</p> Signup and view all the answers

    What is the major consequence of untreated giardiasis caused by Giardia lamblia?

    <p>Inability to absorb nutrients leading to malnourishment.</p> Signup and view all the answers

    Which protozoan disease is transmitted through mosquito bites?

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

    What is a common host for Balantidium coli, the causative agent of balantidiasis?

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

    What is a common risk factor for developing opportunistic mycoses?

    <p>Having a weakened immune system</p> Signup and view all the answers

    Which statement accurately describes lichens?

    <p>Formed by the mutualistic relationship between an alga and a fungus</p> Signup and view all the answers

    Which of the following is NOT a stage in the helminth life cycle?

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

    What is a primary effect of hookworms on their hosts?

    <p>Nutrient absorption disruption</p> Signup and view all the answers

    What can result from a T. solium tapeworm infection?

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

    Which of the following statements about slime molds is true?

    <p>They have both fungal and protozoal characteristics.</p> Signup and view all the answers

    What is the main cause of anemia in individuals infected with hookworms?

    <p>Blood-sucking activity of the worms</p> Signup and view all the answers

    Which species of hookworm commonly infects humans?

    <p>Necator americanus</p> Signup and view all the answers

    What are blastospores more commonly known as?

    <p>Yeast cells</p> Signup and view all the answers

    What is the main reproduction method of yeasts?

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

    Which of the following structures is NOT produced by yeast?

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

    Which yeast is most frequently isolated from human clinical specimens?

    <p>Candida albicans</p> Signup and view all the answers

    What differentiates yeast colonies from bacterial colonies when viewed microscopically?

    <p>Yeast colonies are oval-shaped and larger</p> Signup and view all the answers

    What structures do moulds produce for reproduction?

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

    Which type of fungi includes mushrooms and puffballs?

    <p>Fleshy fungi</p> Signup and view all the answers

    What is the term for fungal infections?

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

    Study Notes

    Eukaryotic Microbes

    • Eukaryotic microbes include algae, fungi, protozoa, lichens, and slime molds.
    • Algae: Photosynthetic eukaryotes that can vary from unicellular to multicellular forms; cell walls usually contain cellulose.
    • Fungi: Non-photosynthetic eukaryotic organisms, including yeasts and molds; their cell walls contain chitin.
    • Protozoa: Unicellular eukaryotes that feed on organic matter; lack cell walls but may have protective structures like pellicles.

    Algae

    • Characteristics: Photosynthetic, have various structures such as plastids and flagella; classified by pigments into green, golden, brown, or red algae.

    • Medical Significance:

      • Prototheca genus can cause rare infections like protothecosis.
      • Phycotoxins from some algae can cause paralytic shellfish poisoning, linked to “Red Tides.”

    • Paralytic Shellfish Poisoning Symptoms:

      • Symptoms may include numbness, headaches, nausea, and severe cases can lead to paralysis and respiratory failure.

    Protozoa

    • Characteristics: Mostly unicellular, found in soil and water; ingest other organisms for nutrients and are more animal-like in nature.

    • Locomotion Types:

      • Amebae: Move via pseudopodia (e.g., Entamoeba histolytica).
      • Ciliates: Move using cilia (e.g., Balantidium coli).
      • Flagellates: Move using flagella (e.g., Giardia lamblia).
      • Sporozoa: No visible movement (e.g., Plasmodium spp.).

    • Diseases Caused:

      • Dysentery: Caused by Entamoeba histolytica; leads to severe diarrhea with blood, untreated can be fatal.
      • Balantidiasis: Infects humans often asymptomatically, but can present with dysentery.
      • Giardiasis: Caused by Giardia lamblia from contaminated food/water; may lead to malnourishment.
      • Malaria: Caused by Plasmodium species; symptoms include fever, chills, and can progress to severe complications without treatment.

    Fungi

    • General Characteristics: Not photosynthetic; play a role as decomposers; can be harmful or beneficial.

    • Reproduction: Spores can be sexual or asexual; some fungi can reproduce via budding or hyphal extension.

    • Classification: Based on mode of sexual reproduction; Deuteromycotina includes important molds like Aspergillus and Candida albicans.

    • Dimorphic Fungi: Can exist as yeasts or molds based on environmental conditions; pathogenic types include Histoplasma capsulatum and Coccidioides immitis.

    • Yeasts: Unicellular eukaryotic organisms; reproduce primarily by budding; used in baking and brewing. Candida albicans is frequently isolated in clinical specimens.

    • Molds: Have filamentous structures called hyphae; can produce antibiotics and are essential in cheese fermentation.

    • Fungal Infections (Mycoses):

      • Risk increased in immunocompromised individuals; can cause severe systemic infections and allergic reactions; difficult to treat.

    Lichens and Slime Molds

    • Lichens: Mutualistic associations between fungi and algae; appear as colored patches on surfaces.
    • Slime Molds: Exhibit features of both fungi and protozoa; found in soil and decaying organic matter.

    Helminths

    • General Characteristics: Parasitic worms living in the host; typically disrupt nutrient absorption.

    • Life Cycle Stages: Egg, larva, adult worm.

    • Common Types:

      • Hookworms (Ancylostoma duodenale, Necator americanus): Infect millions globally; enter body through skin, causing anemia and nutritional deficiencies.
      • Tapeworms (e.g., Taenia saginata and Taenia solium): Live in intestines; may lead to asymptomatic infections; T. solium can cause severe complications like cysticercosis.

    Key Notes

    • Eukaryotic microbes play diverse roles in health and disease.
    • Understanding their classification, characteristics, and associated diseases aids in the study of microbiology and public health.

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    Eukaryotic Microbes PDF

    Description

    Test your knowledge on eukaryotic microbes including algae, fungi, protozoa, and lichens. This quiz covers their characteristics, classifications, and medical significance. Essential for nursing and microbiology students at Ramon Magsaysay State University.

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