Title

They retain the crystal violet stain used in Gram-staining.

They have a thick peptidoglycan cell wall. (correct)

They lack an outer membrane

They are less resistant to antibiotics than gram-positive bacteria

To aid in the retention of the crystal violet stain used in Gram-staining.

To provide a barrier against the entry of antibiotics. (correct)

To provide structural support for the cell wall.

To aid in the transport of nutrients across the cell membrane

Gram-negative bacteria have a thicker peptidoglycan cell wall.

Gram-positive bacteria lack an outer membrane

Gram-negative bacteria lack a cytoplasmic cell membrane

Gram-positive bacteria have a layer of lipopolysaccharides covering their peptidoglycan cell wall. (correct)