Microbiology MCQs
Microbiology MCQs cover bacteriology, virology, mycology, parasitology, and immunology, testing pathogen identification, microbial physiology, and infection control. Ideal for MDCAT, FCPS, NTS, and USMLE preparation, these quizzes boost academic knowledge, clinical skills, and exam success.
Q: Capsid in a virus serves to
A) Aid in replication
B) Form the viral envelope
C) Enclose the genetic material
D) Provide energy
✅ Correct Answer: C
Explanation: The capsid is a protein shell that protects the viral nucleic acid and assists in host infection.
Q: The process of killing all microbial life, including spores, is called
A) Disinfection
B) Antisepsis
C) Sterilization
D) Pasteurization
✅ Correct Answer: C
Explanation: Sterilization ensures complete destruction of all microorganisms, including heat-resistant spores.
Q: The major reservoir of Salmonella typhi is
A) Rodents
B) Soil
C) Water
D) Human gastrointestinal tract
✅ Correct Answer: D
Explanation: Humans are the only known reservoir for Salmonella typhi, the bacterium responsible for typhoid fever.
Q: Bacterial resistance to antibiotics is often carried on
A) Nucleus
B) Ribosomes
C) Plasmids
D) Cell membrane
✅ Correct Answer: C
Explanation: Plasmids often contain genes that confer resistance to antibiotics, facilitating rapid spread.
Q: Anthrax is caused by
A) Listeria monocytogenes
B) Escherichia coli
C) Bacillus anthracis
D) Clostridium botulinum
✅ Correct Answer: C
Explanation: Bacillus anthracis produces spores and a toxin that causes anthrax in humans and animals.