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: Capsid in a virus serves to
A) Aid in replication
B) Form the viral envelope
C) Enclose the genetic material
D) Provide energy
Q: The process of killing all microbial life, including spores, is called
A) Disinfection
B) Antisepsis
C) Sterilization
D) Pasteurization
Q: The major reservoir of Salmonella typhi is
A) Rodents
B) Soil
C) Water
D) Human gastrointestinal tract
Q: Bacterial resistance to antibiotics is often carried on
A) Nucleus
B) Ribosomes
C) Plasmids
D) Cell membrane
Q: Anthrax is caused by
A) Listeria monocytogenes
B) Escherichia coli
C) Bacillus anthracis
D) Clostridium botulinum
Q: Molecular identification of bacteria commonly uses
A) Ribosomal RNA sequences
B) Antibiotic testing
C) Flagellar staining
D) Capsule staining
Q: The skin microbiota includes
A) A diverse group of microbes
B) Only viruses
C) Only harmful bacteria
D) Only Gram-negative bacteria
Q: Acquired immunity results from
A) Physical barriers
B) Direct exposure to antigens
C) Passive antibody transfer
D) Genetic inheritance
Q: The time between exposure to a pathogen and appearance of symptoms is called
A) Incubation period
B) Convalescence
C) Infectious period
D) Prodromal stage
Q: Fungi differ from bacteria by having
A) Eukaryotic cell structure
B) No nucleus
C) Circular DNA
D) Peptidoglycan in the cell wall