Question 1

Which of the following best describes the primary goal of aseptic technique in a clinical microbiology laboratory?

Accepted Answer

To prevent contamination of cultures and protect both the patient and healthcare worker from infection

Question 2

A nurse is caring for a patient with a suspected viral infection. Which diagnostic method would be most appropriate to rapidly identify the viral genome?

Accepted Answer

Polymerase Chain Reaction (PCR)

Question 3

Which of the following is a chemical barrier that contributes to the body's first line of defense against pathogens?

Accepted Answer

Lysozyme in tears and saliva

Question 4

Compare and contrast antigenic shift and antigenic drift in viruses. Which statement is correct?

Accepted Answer

Antigenic shift results from reassortment of viral genome segments, while antigenic drift is due to point mutations.

Question 5

A patient receives a recombinant vector vaccine. Which immune response is primarily stimulated?

Accepted Answer

Active adaptive immunity

Question 6

Which of the following best explains why RNA viruses evolve faster than DNA viruses?

Accepted Answer

RNA-dependent RNA polymerases lack proofreading ability

Question 7

A nurse is exposed to blood from a patient with hepatitis B. Which immediate action is most appropriate to reduce the risk of infection?

Accepted Answer

Wash the area with soap and water and report the exposure for post-exposure prophylaxis

Question 8

Which of the following is an example of a physical barrier in the human body’s defense against infection?

Accepted Answer

Intact skin

Question 9

A patient presents with fever and cough. Sputum culture reveals Gram-negative rods. Which staining technique was most likely used to identify the bacteria?

Accepted Answer

Gram stain

Question 10

Which of the following statements about adaptive immunity is correct?

Accepted Answer

It involves memory cells that respond more rapidly upon re-exposure to the same antigen

Question 11

A nurse is reviewing a patient’s vaccination history. Which type of vaccine is most likely to require booster doses to maintain immunity?

Accepted Answer

Inactivated (killed) vaccine

Question 12

Which of the following best describes the concept of herd immunity?

Accepted Answer

Protection of unvaccinated individuals when a sufficient proportion of the population is immune

Question 13

A patient is diagnosed with tuberculosis. Which of the following is the most important reason for using a combination of antibiotics in treatment?

Accepted Answer

To prevent the development of antimicrobial resistance

Question 14

Which of the following is a major function of normal microbiota in the human body?

Accepted Answer

They compete with pathogens for nutrients and space

Question 15

A nurse is caring for a patient with a wound infection. Which laboratory test would best help determine the appropriate antibiotic therapy?

Accepted Answer

Antibiotic susceptibility testing

Question 16

Which of the following equations correctly represents the calculation of attack rate in an epidemiological study?

Accepted Answer

$Attack\ Rate = \frac{Number\ of\ new\ cases}{Population\ at\ risk} 	imes 100$

Question 17

A patient develops symptoms of influenza after exposure to a sick coworker. Which term best describes the coworker in this scenario?

Accepted Answer

Carrier

Question 18

Which of the following is a distinguishing feature of prokaryotic cells compared to eukaryotic cells?

Accepted Answer

Lack of a true nucleus

Question 19

A nurse is teaching a patient about the importance of hand hygiene. Which statement best explains its role in infection control?

Accepted Answer

Hand hygiene removes transient microorganisms that can cause disease

Question 20

Which of the following best describes the difference between an observation and a scientific conclusion in microbiology?

Accepted Answer

An observation is a direct measurement or description, while a conclusion is an interpretation based on evidence

MIC203 Microbiology Lecture Syllabus and Core Concepts for Nursing Students

Study Guide - Practice Questions

Study Guide - Flashcards