Question

65. Choose the false statement:

A. The Gram+ bacterial cell wall is composed mostly of polysaccharides complexed with small proteins; it surrounds the plasma membrane and protects the cell from osmotic shock.

B. The Gram+ cell wall influences the exchange of materials between the bacterium’s environment and its cytoplasm; in contrast, based on its structure, the Gram- cell wall has little or no influence or effect on cellular permeability.

C. Even though the cell walls of Gram+ and Gram- bacteria both contain some peptidoglycan, Gram+’s are significantly more affected by antibiotics like penicillin than are Gram-‘s.

Answer 1

The false statement is
Option B: The Gram+ cell wall influences the exchange of materials between the bacterium’s environment and its cytoplasm; in contrast, based on its structure, the Gram- cell wall has little or no influence or effect on cellular permeability.

The cell water of gram + positive bacteria is permeable to most materials, while that of gram negative bacteria is less permeable owing to its two layers: the peptidoglycan layer and the Lipopolysaccharide layer.