$$N_{final} = N_{initial} \times 2$$^{n}$$

Question 1

Which of the following best describes the primary difference between the innate and adaptive immune responses?

Accepted Answer

Adaptive responses take longer to mount and are specific to particular antigens, while innate responses are rapid and nonspecific.

Question 2

During a secondary exposure to the same antigen, which antibody is produced in higher quantities and more rapidly?

Accepted Answer

IgG

Question 3

Which stage of the adaptive immune response involves antigen-presenting cells (APCs) displaying antigens to T cells?

Accepted Answer

Stage 1: Antigen Presentation

Question 4

A patient receives a tissue transplant, but their immune system attacks the new tissue. Which protein is most likely responsible for this rejection?

Accepted Answer

Major histocompatibility complex (MHC)

Question 5

Which of the following is TRUE regarding haptens?

Accepted Answer

Haptens are incomplete antigens and require linkage to a protein or polysaccharide to trigger an immune response.

Question 6

Which cell type is responsible for directly destroying virus-infected or cancerous cells?

Accepted Answer

T cytotoxic cells (TC)

Question 7

What is the main function of plasma cells in the adaptive immune response?

Accepted Answer

Produce antibodies that bind to antigens

Question 8

Which of the following best explains why proteins are generally more immunogenic than lipids?

Accepted Answer

Proteins have greater molecular complexity and size, increasing their ability to trigger an immune response.

Question 9

A dendritic cell presents an antigen using MHC II. Which cell will recognize this complex?

Accepted Answer

T helper cell (CD4+)

Question 10

Which of the following is a correct sequence for the four stages of adaptive immunity?

Accepted Answer

Antigen presentation → Lymphocyte activation → Lymphocyte proliferation and differentiation → Antigen elimination and memory

Question 11

Which of the following statements about immunological memory is correct?

Accepted Answer

Immunological memory allows for a rapid and effective response upon secondary exposure to the same antigen.

Question 12

Which of the following is a function of T helper cells (TH)?

Accepted Answer

Coordinate the adaptive immune response by releasing cytokines

Question 13

Which subclass of T helper cells is primarily responsible for stimulating B cells to make antibodies?

Accepted Answer

T helper 2 (TH2) cells

Question 14

Which equation best represents the clonal expansion of lymphocytes after activation?

Accepted Answer

$$N_{final} = N_{initial} 	imes 2$$^{n}$$

Question 15

Which of the following is TRUE regarding the antigen recognition capacity of B and T cells?

Accepted Answer

Each B or T cell recognizes only one specific epitope, but the body produces a vast number of B and T cells to cover many epitopes.

Question 16

Which process ensures that T and B cells do not attack self-tissues?

Accepted Answer

Self-tolerance screening

Question 17

Which of the following is a correct description of the role of MHC I in antigen presentation?

Accepted Answer

MHC I presents intracellular antigens to T cytotoxic cells.

Question 18

A superantigen causes a dangerous immune response by:

Accepted Answer

Directly crosslinking MHC II and T helper cell TCR, causing bulk, nonspecific activation and cytokine release.

Question 19

Which of the following best describes the outcome when a T cytotoxic cell recognizes a cell displaying a foreign antigen with MHC I?

Accepted Answer

The T cytotoxic cell releases perforins and granzymes, inducing apoptosis in the target cell.

Adaptive Immunity: Mechanisms and Cellular Players

Study Guide - Practice Questions