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Questions and Answers
What is the name given to rod-shaped bacteria?
What is the name given to rod-shaped bacteria?
- Vibrio
- Spirochetes
- Bacilli (correct)
- Cocci
Which structure of a bacterial cell is described as lying external to the cytoplasmic membrane?
Which structure of a bacterial cell is described as lying external to the cytoplasmic membrane?
- Cell membrane
- Flagella
- Cytoplasm
- Cell wall (correct)
What characteristic is common to all fungi?
What characteristic is common to all fungi?
- They have filamentous structures. (correct)
- They are prokaryotic organisms.
- They reproduce primarily by binary fission.
- They possess chloroplasts for photosynthesis.
What defines dimorphic fungi?
What defines dimorphic fungi?
The cytoplasm of bacterial cells does not contain which of the following organelles?
The cytoplasm of bacterial cells does not contain which of the following organelles?
What type of nutrition do parasites primarily rely on?
What type of nutrition do parasites primarily rely on?
Which statement accurately describes bacterial flagella?
Which statement accurately describes bacterial flagella?
What defines fungi as saprophytic organisms?
What defines fungi as saprophytic organisms?
Study Notes
Main Groups of Micro-Organisms
- Study of bacteria, viruses, parasites, and fungi each represent different fields of microbiology.
Bacteria
- Characterized by distinct shapes:
- Cocci: Spherical
- Bacilli: Rod-shaped
- Vibrio: Comma-shaped
- Spirochetes: Spiral-shaped
- Bacterial cytoplasm is viscous and gel-like, containing organic and inorganic solutes, and numerous ribosomes.
- Lacks mitochondria and endoplasmic reticulum.
- The cell wall is external to the cytoplasmic membrane, measuring 10-25 nm in thickness, providing strength, rigidity, and some elasticity.
- Bacterial flagella are long, spirally twisted filaments that aid in locomotion.
Viruses
- Comprised of DNA and RNA viruses, each with distinct examples; however, specifics of examples were not provided.
Parasitology
- A parasite derives nutritional requirements from intimate contact with another organism.
- Parasites can be simple unicellular protozoa or complex metazoa.
Mycology
- All fungi are classified as eukaryotic organisms with:
- Cell walls made of chitin
- Filamentous structures
- Spores for reproduction
- Fungi can thrive as:
- Saprophytes: Decomposing dead organic material.
- Parasitic: Residing on living organisms.
- Unicellular (yeasts) or multicellular (mycelia formed by hyphae).
- Dimorphic fungi can switch between yeast form (at body temperature) and mycelial form (at lower temperatures, such as 20°C).
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Description
Explore the diverse world of micro-organisms including bacteria, viruses, parasites, and fungi. This quiz covers their characteristics, structures, and functions, providing a foundation for understanding microbiology. Test your knowledge on these fundamental topics and learn about the intricacies of each group.
