Which Type of Pathogen Can Be Classified Based on Its

Question

Which type of pathogen can be classified based on its reaction to Gram stain?
A) bacterium
B) virus
C) prion
D) protozoon

Accepted Answer

Gram staining is a technique used to differentiate bacterial species into two categories: Gram-positive and Gram-negative. Therefore, only bacteria can be classified based on their reaction to Gram stain. Viruses, prions, and protozoans do not have cell walls and cannot be stained using this method.