Microbiology - MCQ Practice Questions

Which of the following bacterial structures is responsible for antibiotic resistance through enzymatic inactivation?

What is the primary mode of transmission for Hepatitis A virus in developing countries?

Which bacterial species is most commonly associated with food poisoning from poultry products?

Which viral envelope protein is primarily responsible for binding to host cell receptors in influenza virus?

In bacterial DNA replication, which enzyme unwinds the double helix?

Which of the following is a characteristic feature of SARS-CoV-2 that contributes to its high transmissibility?

A patient presents with atypical pneumonia. Which bacterial pathogen should be considered if Gram staining shows no organism but PCR is positive?

Which viral replication strategy involves reverse transcription of RNA to DNA?

Which bacterial structure mediates horizontal gene transfer through direct cell-to-cell contact?

Which of the following viruses has been successfully eradicated from the wild through vaccination programs?

A diagnostic lab suspects tuberculosis. Which staining technique is most appropriate for detecting Mycobacterium tuberculosis?

Which bacterial toxin directly inhibits protein synthesis by modifying EF-2 in host cells?

In viral latency, which herpesvirus establishes latency in sensory nerve ganglia?

Which bacterial species is an obligate intracellular pathogen that causes Q fever?

A patient with recurrent respiratory infections is found to have defective viral interferon response. Which immune component is primarily affected?

Which mechanism allows certain bacteria to survive within macrophages despite phagocytosis?

In the context of emerging infectious diseases 2024-25, which coronavirus variant has shown increased immune evasion?

Which viral enzyme is responsible for integrating retroviral DNA into the host genome?

A nosocomial outbreak of antibiotic-resistant Acinetobacter baumannii is investigated. Which transmission route is most likely?

Which of the following bacterial structures is responsible for adherence to host cells?