The Gram-staining method is useful for classifying all bacteria that
A) have two plasma membranes.
B) associate to form chains, plates, or clusters of cells.
C) have cell walls with at least some peptidoglycan.
D) are prokaryotic.
E) form endospores.

Question

Quizplus · Accepted Answer

The Gram-staining method is used to differentiate bacteria based on the structure of their cell wall. Bacteria with cell walls containing at least some peptidoglycan can be classified using this method.

Answer: D
 The Gram-staining method is used to classify prokaryotic organisms, which includes all bacteria. It cannot be used to classify eukaryotic organisms such as fungi or protists.

Therefore, the best choice is either C or D.

The Gram-Staining Method Is Useful for Classifying All Bacteria That