Question 1

Which of the following best describes the main difference between disinfectants and antiseptics?

Accepted Answer

Disinfectants are used on inanimate objects, while antiseptics are used on living tissues.

Question 2

A hospital is choosing a method to sterilize heat-sensitive plastic equipment. Which method is most appropriate?

Accepted Answer

Sterilization with ethylene oxide gas

Question 3

Which of the following antibiotics inhibits bacterial DNA gyrase?

Accepted Answer

Ciprofloxacin

Question 4

A patient is given an antimicrobial drug that causes 'black hairy tongue' and permanent staining of developing teeth. Which drug is most likely responsible?

Accepted Answer

Tetracycline

Question 5

Which of the following is a beta-lactam antibiotic that inhibits cell wall synthesis and is commonly given by injection due to poor oral absorption?

Accepted Answer

Penicillin G

Question 6

Which of the following best describes the function of a neutrophil?

Accepted Answer

Phagocytosis of bacteria and debris

Question 7

A patient with Bruton-type agammaglobulinemia is most likely to have which of the following immune deficiencies?

Accepted Answer

Deficiency of B cells and antibodies

Question 8

Which of the following is a property of IgM antibodies?

Accepted Answer

They are the first antibody produced in a primary immune response.

Question 9

Which of the following best describes the mechanism of Type I hypersensitivity?

Accepted Answer

IgE antibodies bind to mast cells, leading to histamine release upon allergen exposure.

Question 10

Which of the following is a characteristic of Streptococcus pyogenes?

Accepted Answer

It is a Gram-positive coccus that causes strep throat and can lead to rheumatic fever.

Question 11

Which of the following best describes the function of MHC class II molecules?

Accepted Answer

They present exogenous antigens to helper T cells.

Question 12

A patient receives a vaccine containing inactivated virus. Which type of immunity is this?

Accepted Answer

Artificially acquired active immunity

Question 13

Which of the following is a function of the complement system?

Accepted Answer

Opsonization, inflammation, and lysis of pathogens

Question 14

Which of the following is a property of Streptococcus pneumoniae that contributes to its virulence?

Accepted Answer

Presence of a polysaccharide capsule

Question 15

A patient is diagnosed with tuberculosis. Which of the following organisms is responsible?

Accepted Answer

Mycobacterium tuberculosis

Question 16

Which of the following best describes the principle of the ELISA (enzyme-linked immunosorbent assay) test?

Accepted Answer

Detection of antigen or antibody using an enzyme-labeled indicator and a color change

Question 17

Which of the following is a function of Streptomyces in medicine?

Accepted Answer

Production of many useful antibiotics

Question 18

A patient receives an injection of antitoxin after exposure to tetanus. Which type of immunity is this?

Accepted Answer

Artificially acquired passive immunity

Question 19

Which of the following best describes the process of agglutination?

Accepted Answer

Particulate antigens are clumped together by antibodies.

Question 20

Which of the following is a cardinal sign of inflammation?

Accepted Answer

Redness

Microbiology Exam Review: Disinfection, Immunology, and Pathogenic Microorganisms

Study Guide - Practice Questions

Study Guide - Flashcards