Q: In the context of adaptive immunity, which equation best represents clonal proliferation of lymphocytes after antigen recognition?

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

Question 1

Which of the following best describes the function of cilia in the respiratory tract, as shown in the provided images?

Accepted Answer

Cilia move mucus and trapped particles toward the throat for removal.

Question 2

A patient with a genetic disorder lacks functional goblet cells in their respiratory epithelium. Which consequence is most likely?

Accepted Answer

Decreased production of mucus, leading to less trapping of dust and pathogens.

Question 3

Which sequence correctly describes the order of events in the respiratory tract's first line of defense?

Accepted Answer

Nasal hairs filter → mucus traps → cilia move trapped particles toward the throat

Question 4

Which immune cell is responsible for producing antibodies, as illustrated in the B-cell clone diagram?

Accepted Answer

Plasma cell

Question 5

A viral infection triggers the activation of cytotoxic T cells. Which molecule must be present on the infected cell for cytotoxic T cell recognition?

Accepted Answer

MHC class I presenting viral antigen

Question 6

Which process is illustrated by antibodies binding to a virus and preventing its entry into host cells, as shown in the SARS-CoV-2 diagram?

Accepted Answer

Neutralization

Question 7

In the agglutination diagram, what is the primary effect of IgM antibodies cross-linking bacteria?

Accepted Answer

Clumping bacteria together to facilitate clearance by phagocytes

Question 8

Which immune mechanism is depicted when antibodies coat a pathogen, making it easier for phagocytic cells to engulf it?

Accepted Answer

Opsonization

Question 9

The membrane attack complex (MAC) is formed during complement activation. What is the result of MAC formation on a pathogen's membrane?

Accepted Answer

MAC creates pores in the membrane, leading to cell lysis.

Question 10

A patient is exposed to a pathogen for the second time. Which cell type is primarily responsible for the faster and stronger immune response?

Accepted Answer

Memory cell

Question 11

Which of the following best explains why the respiratory tract is lined with ciliated epithelial cells and mucus, as shown in the images?

Accepted Answer

To trap and remove inhaled particles and pathogens before they reach the lungs

Question 12

Which immune cell releases cytokines to activate both antibody-mediated and cell-mediated responses, as shown in the antigen-presenting cell diagram?

Accepted Answer

Helper T cell

Question 13

In the context of adaptive immunity, which equation best represents clonal proliferation of lymphocytes after antigen recognition?

Accepted Answer

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

Question 14

A person inhales pollen grains, which are trapped in the mucus layer of their respiratory tract. Which process is responsible for moving these trapped particles out of the airways?

Accepted Answer

Ciliary movement toward the pharynx

Question 15

Which of the following is a correct description of the role of MHC molecules in T cell activation, as shown in the antigen-presenting cell diagram?

Accepted Answer

MHC class I presents antigen fragments to cytotoxic T cells.

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