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Questions and Answers
What is the size of an 'average' Escherichia coli cell?
What is the size of an 'average' Escherichia coli cell?
- 2 µm long and 0.5 µm wide (correct)
- 1 µm long and 0.2 µm wide
- 10 µm long and 5 µm wide
- 5 µm long and 2 µm wide
What is a typical shape for a bacterium known as?
What is a typical shape for a bacterium known as?
- Hexagonal
- Coccus (correct)
- Square
- Star-shaped
What is responsible for some of the unique biological structures and pathogenicity of bacteria?
What is responsible for some of the unique biological structures and pathogenicity of bacteria?
- Well-developed cell structure (correct)
- Elaborate structures bearing reproductive spores
- Distinct colony morphologies
- Complex life cycles
What is generally characteristic of a given bacterial species but can vary depending on growth conditions?
What is generally characteristic of a given bacterial species but can vary depending on growth conditions?
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Which bacterial species is known for its complex life cycles involving the production of stalks and appendages?
Which bacterial species is known for its complex life cycles involving the production of stalks and appendages?
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Study Notes
Cell Size and Shape
- An 'average' Escherichia coli cell is approximately 2-6 μm in length and 0.5-1 μm in width.
- A typical shape for a bacterium is a rod shape or bacillus.
Unique Biological Structures and Pathogenicity
- The cell wall is responsible for some of the unique biological structures and pathogenicity of bacteria.
Characteristics of Bacterial Species
- The morphology of a bacterium is generally characteristic of a given bacterial species, but can vary depending on growth conditions.
Caulobacter crescentus
- Caulobacter crescentus is a bacterial species known for its complex life cycles involving the production of stalks and appendages.
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