5 Questions
What are some examples of bacteria that have the ability to produce S layers?
Clostridium difficile and Bacillus anthracis.
Explain the function of S layers in bacterial cells.
S layers are single layers of thousands of copies of a single protein linked together like a tiny chain-link fence. They are often called “the armor” of a bacterial cell, providing structural strength, protecting the cell from osmotic lysis, aiding in attachment, and conferring cell shape.
Describe the composition and function of bacterial glycocalyx.
The bacterial glycocalyx is a viscous (sticky), gelatinous polymer that is external to the cell wall and composed of polysaccharide, polypeptide, or both. It aids in attachment to solid surfaces, including tissue surfaces in plant and animal hosts.
How does the chemical composition of glycocalyx vary among different bacterial species?
The chemical composition of glycocalyx varies widely with the species.
What is the role of S layers in many Archaea?
In many Archaea, thick S-layers can take on the role of the cell wall and are responsible for providing structural strength, protecting the cell from osmotic lysis, and conferring cell shape.
Test your knowledge about the protective surface coatings of bacterial cells, including S layers and glycocalyx. Learn about their structure, function, and how they help bacteria survive harsh environmental conditions.
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