ATI RN
Immune System Multiple Choice Questions and Answers PDF Questions
Question 1 of 5
After binding to an infected cell, the cytotoxic T cell
Correct Answer: D
Rationale: Cytotoxic T cells release perforin to lyse infected cells, not interleukin-1, phagocytosis, or neutralization.
Question 2 of 5
What is the difference between the recombination of heavy and light chain variable regions?
Correct Answer: B
Rationale: Heavy chains use V, D, and J segments, while light chains use V and J only; both require RAG1/2.
Question 3 of 5
A naïve lymphocyte is:
Correct Answer: C
Rationale: Naïve lymphocytes are mature, antigen-unexposed cells ready for activation.
Question 4 of 5
The first tenet of clonal selection theory relies SPECIFICALLY on
Correct Answer: D
Rationale: Clonal selection posits each B-cell clone has a unique receptor; joinings , mutations , and splicing support diversity, not the first tenet.
Question 5 of 5
Graft versus host disease results when the recipient lacks or has a poor immune system, and the donor organ and recipient express different:
Correct Answer: A
Rationale: GVHD occurs due to HLA mismatch ; T cells mediate, but HLA drives it.