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: Molecular identification of bacteria commonly uses
A) Ribosomal RNA sequences
B) Antibiotic testing
C) Flagellar staining
D) Capsule staining
✅ Correct Answer: A
Explanation: 16S rRNA gene sequencing is widely used for bacterial identification due to its highly conserved nature.
Q: The skin microbiota includes
A) A diverse group of microbes
B) Only viruses
C) Only harmful bacteria
D) Only Gram-negative bacteria
✅ Correct Answer: A
Explanation: Normal skin flora includes bacteria, fungi, and viruses that coexist and often protect against pathogens.
Q: Acquired immunity results from
A) Physical barriers
B) Direct exposure to antigens
C) Passive antibody transfer
D) Genetic inheritance
✅ Correct Answer: B
Explanation: Acquired immunity develops after exposure to antigens through infection or vaccination.
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
✅ Correct Answer: A
Explanation: The incubation period is the interval between infection and the onset of clinical symptoms.
Q: Fungi differ from bacteria by having
A) Eukaryotic cell structure
B) No nucleus
C) Circular DNA
D) Peptidoglycan in the cell wall
✅ Correct Answer: A
Explanation: Fungi are eukaryotic and possess a true nucleus and organelles, unlike bacteria.