5 Questions
How are bacteria classified based on their response to the Gram stain?
Gram positive and Gram negative
What is the outermost layer in the cell envelope of most prokaryotic cells?
Glycocalyx
What determines the shape of the bacterial cell?
Cell wall
What provides a strong structural support to prevent the bacterium from bursting or collapsing?
Cell wall
What could the glycocalyx be in some bacteria?
Slime layer
Study Notes
Bacterial Classification and Cell Envelope
- Bacteria are classified into two main groups based on their response to the Gram stain: Gram-positive and Gram-negative.
- The outermost layer in the cell envelope of most prokaryotic cells is the peptidoglycan (also known as murein) layer.
Cell Shape and Support
- The shape of the bacterial cell is determined by the peptidoglycan layer.
- The peptidoglycan layer provides a strong structural support to prevent the bacterium from bursting or collapsing due to osmotic pressure.
Glycocalyx
- In some bacteria, the glycocalyx can be a loose, irregular layer of polysaccharides and proteins, known as a capsule.
Test your knowledge of prokaryotic cell structure and classification with this quiz. Explore the intricate layers of the cell envelope and learn how bacteria are classified based on their characteristics.
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