Question 1

Which of the following best describes the function of antibodies in neutralization?

Accepted Answer

Antibodies bind to toxins or viruses, preventing them from interacting with host cells.

Question 2

Which cell type is responsible for the production of antibodies?

Accepted Answer

B lymphocytes

Question 3

During a secondary immune response, which antibody class is produced in the greatest quantity?

Accepted Answer

IgG

Question 4

Which of the following is NOT a function of antibodies?

Accepted Answer

Direct destruction of bacteria via phagocytosis

Question 5

A patient receives an injection of antivenom after a snake bite. What type of immunity is this?

Accepted Answer

Artificially acquired passive immunity

Question 6

Which vaccine type is most likely to provide herd immunity?

Accepted Answer

Attenuated (live) vaccine

Question 7

What is a major risk associated with attenuated vaccines?

Accepted Answer

They may cause disease in immunosuppressed individuals.

Question 8

Which of the following statements about toxoid vaccines is correct?

Accepted Answer

They require multiple doses for effective immunity.

Question 9

Which antibody class is most associated with body secretions such as saliva and mucus?

Accepted Answer

IgA

Question 10

What is the primary advantage of mRNA vaccines compared to traditional vaccines?

Accepted Answer

They can be synthesized in vitro, allowing rapid development.

Question 11

Which of the following is a correct sequence for the phases of clinical trials for vaccines?

Accepted Answer

Phase I: small number for safety; Phase II: hundreds for safety and efficacy; Phase III: thousands for efficacy and rare effects

Question 12

Which of the following is an example of artificially acquired active immunity?

Accepted Answer

Receiving a vaccine

Question 13

Which antibody function involves the binding of multiple pathogens together, making them easier targets for phagocytes?

Accepted Answer

Agglutination

Question 14

Which of the following statements about the primary immune response is correct?

Accepted Answer

IgM is produced first, followed by IgG.

Question 15

Which scientist developed the first injectable polio vaccine using killed virus?

Accepted Answer

Jonas Salk

Question 16

Which of the following is a disadvantage of passive immunization?

Accepted Answer

It can trigger allergic reactions, especially if antiserum is from a different species.

Question 17

Which antibody class is involved in allergic reactions and defense against parasitic infections?

Accepted Answer

IgE

Question 18

Which of the following best describes the role of the major histocompatibility complex (MHC) in adaptive immunity?

Accepted Answer

MHC proteins present antigenic epitopes to immune cells.

Question 19

A patient is exposed to tetanus toxin and receives a tetanus vaccine. Which type of immunity is being acquired?

Accepted Answer

Artificially acquired active immunity

Question 20

Which of the following COVID-19 vaccines is an mRNA vaccine?

Accepted Answer

Moderna

Adaptive Immunity and Immunization: Mechanisms, Antibodies, and Vaccines

Study Guide - Practice Questions