Question

How can Gram staining be used to determine how bacteria respond to their environments?(1 point)
Responses

Gram staining helps scientists visualize the composition of bacterial cell membranes.
Gram staining helps scientists visualize the composition of bacterial cell membranes.

Gram staining helps scientists visualize bacterial motility.
Gram staining helps scientists visualize bacterial motility.

Gram staining helps scientists visualize bacterial antibiotic resistance.
Gram staining helps scientists visualize bacterial antibiotic resistance.

Gram staining helps scientists visualize the thickness of bacterial cell walls.
Gram staining helps scientists visualize the thickness of bacterial cell walls.

Answer 1

Gram staining helps scientists visualize the thickness of bacterial cell walls.

(Gram-positive bacteria retain crystal violet due to a thick peptidoglycan layer; Gram-negative do not and appear pink because they have a thin peptidoglycan layer plus an outer membrane.)