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: A pathogenic protozoan responsible for amoebic dysentery is
A) Trypanosoma brucei
B) Entamoeba histolytica
C) Giardia lamblia
D) Plasmodium vivax
Q: Inactivation of microbes using high-frequency sound waves is known as
A) Radiation
B) Sonication
C) Desiccation
D) Filtration
Q: A selective medium allows growth of
A) Only specific microbes
B) All microorganisms
C) Only fungi
D) Only viruses
Q: The causative agent of gas gangrene is
A) Clostridium perfringens
B) Staphylococcus aureus
C) Mycobacterium leprae
D) Pseudomonas aeruginosa
Q: Urease-producing bacteria can be detected using
A) Catalase test
B) Coagulase test
C) Urease test
D) TSI slant
Q: Microaerophilic bacteria require
A) Normal oxygen levels
B) No oxygen
C) Reduced oxygen levels
D) High carbon dioxide
Q: A positive Mantoux test indicates
A) Hepatitis infection
B) HIV exposure
C) Malaria immunity
D) Tuberculosis exposure
Q: An exotoxin is typically
A) Produced only during spore formation
B) Secreted by bacteria
C) Found only in viruses
D) A structural component of the cell wall
Q: The site of ATP generation in bacteria is the
A) Cell wall
B) Ribosomes
C) Nucleus
D) Cytoplasmic membrane
Q: Haemophilus influenzae requires
A) Salt agar
B) No oxygen
C) EMB agar
D) Chocolate agar