Concept explainers
To explain: The functions of the capsule or slime layer in bacterial cells.
Introduction: Bacteria are unicellular prokaryotic organisms that maintain a definite shape since they contain the rigid cell wall. They are classified into different types based on the structure, namely coccus (spherical shaped), Bacillus (rod-shaped), filamentous, spirilla (spiral-shaped), appendaged, and pleomorphic bacteria. The structure of bacteria can be viewed under the microscope using the staining methods.
Explanation of Solution
The capsule is the extracellular gel-like layer that surrounds the outside of the cell wall of many bacterial cells. If the layer is irregular and diffuses, then it is called a slime layer. The capsule serves as the protective structures that prevent it from phagocytic white blood cells from engulfing through phagocytosis. It also serves as the site of attachment of the bacterial cells to solid surfaces.
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Chapter 13 Solutions
LooseLeaf Benson's Microbiological Applications Laboratory Manual-Concise Version
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