ATI RN
Immune System Multiple Choice Questions and Answers PDF Questions
Question 1 of 5
A molecule that can elicit an adaptive immune response is called
Correct Answer: D
Rationale: An antigen triggers adaptive immunity by being recognized by lymphocytes, unlike complement (innate), interferon (antiviral), or antibodies (response products).
Question 2 of 5
Which is the least abundant granulocyte in peripheral blood?
Correct Answer: A
Rationale: Basophils are the least abundant granulocytes in blood (<1%), unlike neutrophils (most abundant) or eosinophils; mast cells reside in tissues.
Question 3 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 4 of 5
A naïve lymphocyte is:
Correct Answer: C
Rationale: Naïve lymphocytes are mature, antigen-unexposed cells ready for activation.
Question 5 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.