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B) axial filaments pili D) fimbriae E) all of the above 9) Many bacterial cells\

ID: 277711 • Letter: B

Question

B) axial filaments pili D) fimbriae E) all of the above 9) Many bacterial cells' surroundings have substances that are viscous polymer. Which is NOT a function of these substances? A) serve as an anchorage for flagella. B) protect pathogenic bacteria from phagocytosis by the host cells. C) serve as an extracellular polymeric substance in biofilm. D) enable the cells to survive by attaching to various surfaces in their natural environment. E) all of the above are functions of these extracellular substances. 3

Explanation / Answer

Answer: A; serves as an anchorage for the flagella.

The bacteria expressing extracellular polysaccharide matrix have a wide range of functions, like it protects the bacteria from environmental stress, allow it to aggregate or may allow it to attach to the substratum( biofilm). It protects bacteria from phagocytosis. But the flagella is not anchored in this extracellular matrix. The anchoring of flagella is quite deeper then this may be in the cell wall and cell membrane.