Microbiology MCQs
Microbiology MCQs challenge students to identify pathogens, understand microbial physiology, and master infection control protocols. These questions span bacteriology, virology, mycology, parasitology, and immunology. Suitable for exams like MDCAT, FCPS, NTS, and USMLE, these quizzes improve both academic knowledge and clinical readiness.
Q: Endotoxins are typically associated with
A) Viruses
B) Protozoa
C) Gram-negative bacteria
D) Gram-positive bacteria
Q: Lysozyme in human tears targets
A) RNA
B) Flagella
C) DNA
D) Peptidoglycan
Q: Helicobacter pylori is linked to the development of
A) Pneumonia
B) Meningitis
C) Tuberculosis
D) Peptic ulcers
Q: The first antibody to appear in response to an infection is
A) IgE
B) IgA
C) IgM
D) IgG
Q: Bacterial transformation involves
A) Viral infection
B) Uptake of naked DNA
C) Conjugation
D) Cell fusion
Q: The causative agent of cholera is
A) Salmonella typhi
B) Shigella dysenteriae
C) Vibrio cholerae
D) Escherichia coli
Q: Molds reproduce primarily by
A) Budding
B) Conjugation
C) Binary fission
D) Spore formation
Q: Antigenic drift in viruses refers to
A) Minor genetic changes
B) Environmental mutation
C) Complete genome change
D) Acquisition of plasmids
Q: The mode of transmission for hookworm infection is through
A) Blood transfusion
B) Skin penetration
C) Airborne droplets
D) Ingestion of eggs
Q: The function of reverse transcriptase in retroviruses is to
A) Replicate viral RNA
B) Copy DNA to RNA
C) Translate proteins
D) Convert RNA into DNA