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: Sterilization ensures
A) Reduction in microbial count
B) Destruction of all microbial life
C) Removal of dust
D) Killing of pathogens only
Q: Penicillin was discovered by
A) Alexander Fleming
B) Joseph Lister
C) Robert Koch
D) Louis Pasteur
Q: A capsule in bacteria functions to
A) Increase nutrient uptake
B) Synthesize proteins
C) Aid motility
D) Evade immune response
Q: Plasmids in bacteria are
A) Extrachromosomal DNA
B) RNA fragments
C) Structural components
D) Sites of protein synthesis
Q: Obligate aerobes require
A) High temperatures
B) Low pH
C) Oxygen for survival
D) Carbon dioxide
Q: Binary fission in bacteria leads to
A) Genetic recombination
B) Sexual reproduction
C) Spore formation
D) Asexual reproduction
Q: The gram-negative cell wall contains
A) Teichoic acids
B) Lipopolysaccharide layer
C) Mycolic acid
D) Thick peptidoglycan
Q: An example of a dimorphic fungus is
A) Mucor
B) Aspergillus niger
C) Cryptococcus neoformans
D) Candida albicans
Q: The function of pili in bacteria is to
A) Aid in attachment
B) Facilitate movement
C) Break down toxins
D) Protect against antibiotics
Q: The term “acid-fast” refers to organisms that
A) Lose the primary stain easily
B) Are sensitive to acid
C) Retain stain after acid-alcohol wash
D) Live in acidic environments