Question 1:

Which cells are responsible for the production of antibodies in the immune response?

Explanation: B cells are responsible for the production of antibodies in the immune response. Upon encountering an antigen, B cells differentiate into plasma cells, which secrete antibodies. Therefore, option A is correct.

Question 2:

Which immune cells are responsible for the direct killing of virus-infected cells?

Explanation: T cells are responsible for the direct killing of virus-infected cells. They recognize infected cells through the presentation of viral antigens on the cell surface and induce cell death. Therefore, option B is correct.

Question 3:

Which receptor is responsible for the detection of pathogens by immune cells?

Explanation: Toll-like receptors (TLRs) are responsible for the detection of pathogens by immune cells. TLRs recognize specific molecular patterns associated with pathogens, triggering immune responses. Therefore, option A is correct.

Question 4:

Which cells are responsible for presenting antigens to T cells in the immune response?

Explanation: Dendritic cells are responsible for presenting antigens to T cells in the immune response. They capture and process antigens, then migrate to lymphoid organs to activate T cells. Therefore, option D is correct.

Question 5:

Which process involves the production of memory cells for long-term immunity?

Explanation: Clonal expansion involves the production of memory cells for long-term immunity. During clonal expansion, antigen-specific B and T cells proliferate, generating effector cells and memory cells. Therefore, option D is correct.