A Microbiologist Is Studying the Structure and Function of Bacterial

A microbiologist is studying the structure and function of bacterial cell walls.  In an experiment, group A streptococci are treated with chemicals to solubilize the cell wall.  Various cell wall-associated proteins are subsequently extracted.  Electron microscopic evaluation of a specific protein shows structural homology with mammalian tropomyosin and myosin.  This protein acts as a virulence factor for certain species of the organism.  Which of the following is the most likely function of this bacterial cell wall-associated protein?

A) Excrete antibiotics
B) Protect from osmotic lysis
C) Provide mechanical cell support
D) Resist phagocytosis
E) Transport nutrients into the cell

Correct Answer:

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