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: The function of an autoclave is to
A) Sterilize using dry heat
B) Sterilize using steam under pressure
C) Disinfect using alcohol
D) Kill viruses only
Q: Botulinum toxin acts by
A) Increasing neurotransmitter release
B) Damaging DNA
C) Inhibiting protein synthesis
D) Blocking acetylcholine release
Q: MacConkey agar is selective for
A) Fungi
B) Gram-negative bacteria
C) Gram-positive bacteria
D) Viruses
Q: A lytic bacteriophage
A) Kills the host cell
B) Converts bacteria into spores
C) Forms a symbiotic relationship
D) Integrates into the host genome
Q: The test used to detect syphilis antibodies is the
A) Widal test
B) Tuberculin test
C) ELISA for HIV
D) VDRL test
Q: Leprosy is caused by
A) Mycobacterium tuberculosis
B) Clostridium botulinum
C) Treponema pallidum
D) Mycobacterium leprae
Q: The acid produced by Lactobacillus during fermentation is
A) Butyric acid
B) Citric acid
C) Acetic acid
D) Lactic acid
Q: The presence of bacterial endotoxins can be tested using the
A) VDRL test
B) Catalase test
C) Coagulase test
D) Limulus amoebocyte lysate test
Q: Transmission of rabies occurs primarily through
A) Airborne droplets
B) Fecal contamination
C) Infected animal bites
D) Insect vectors
Q: Staphylococcus aureus can be identified by a positive
A) Coagulase test
B) Oxidase test
C) Catalase test
D) Urease test