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: Prions are infectious agents composed only of
A) DNA
B) Protein
C) RNA
D) Lipid
✅ Correct Answer: B
Explanation: Prions lack nucleic acids and are infectious misfolded proteins causing neurodegenerative diseases.
Q: The primary vector for Dengue fever is
A) Tsetse fly
B) Culex mosquito
C) Aedes aegypti
D) Sandfly
✅ Correct Answer: C
Explanation: Aedes aegypti mosquitoes are responsible for spreading Dengue virus in tropical regions.
Q: Bacterial conjugation involves
A) Spore formation
B) Binary fission
C) Transformation
D) Plasmid transfer
✅ Correct Answer: D
Explanation: Conjugation allows bacteria to transfer plasmid DNA through a pilus from one cell to another.
Q: The causative agent of syphilis is
A) Treponema pallidum
B) Neisseria gonorrhoeae
C) Chlamydia trachomatis
D) Haemophilus ducreyi
✅ Correct Answer: A
Explanation: Treponema pallidum is a spirochete bacterium that causes the sexually transmitted disease syphilis.
Q: The Gram stain was developed by
A) Hans Christian Gram
B) Louis Pasteur
C) Robert Koch
D) Paul Ehrlich
✅ Correct Answer: A
Explanation: Hans Christian Gram created the Gram staining technique to differentiate bacteria based on cell wall composition.