PMLS 2 Comprehensive Practice Test

Which test is typically performed in the Microbiology section?

Gram stain CBC Lipid panel Electrolytes

Correct Answer:

Gram stain

Explanation:

In Microbiology, a Gram stain is a foundational, rapid test used to categorize bacteria by their cell wall properties. It distinguishes Gram-positive organisms, which retain the crystal violet-iodine stain and appear purple, from Gram-negative organisms, which do not retain it and appear pink or red after a counterstain. This quick result guides early identification and helps inform initial treatment decisions while more specific tests and cultures are being processed. The other options—CBC, lipid panel, and electrolytes—belong to hematology and chemistry sections and measure blood cells or metabolic parameters, not microbial characteristics.

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