Microbiology MCQs

Microbiology MCQs cover bacteriology, virology, mycology, parasitology, and immunology, testing pathogen identification, microbial physiology, and infection control. Ideal for MDCAT, FCPS, NTS, and USMLE preparation, these quizzes boost academic knowledge, clinical skills, and exam success.

Q: Bacteria multiply most rapidly during which growth phase?
A) Death phase
B) Stationary phase
C) Log phase
D) Lag phase
Q: Gram-positive bacteria retain the primary stain due to
A) Thick peptidoglycan
B) Thin peptidoglycan
C) Capsule
D) Outer membrane
Q: Mycobacterium tuberculosis is best stained using
A) Acid-fast stain
B) Simple stain
C) Gram stain
D) Endospore stain
Q: Viruses differ from bacteria because they
A) Have ribosomes
B) Lack a nucleus
C) Can reproduce independently
D) Are obligate intracellular parasites
Q: Fungal infections in humans are typically caused by
A) Helminths
B) Eukaryotic organisms
C) Algae
D) Protozoa