ATI RN
Immune System Multiple Choice Questions and Answers Questions
Question 1 of 5
Which of the following options best describes an opsonising agent?
Correct Answer: C
Rationale: C3b coats pathogens to enhance phagocytosis (opsonization), while antibodies also opsonize, but surfactants do not; C3b is the most specific example here.
Question 2 of 5
The following statement correctly describes a common feature of T & B cell development:
Correct Answer: B
Rationale: Both T and B cells rearrange receptor genes stepwise for diversity, not multiple specificities or abundant self-reactivity.
Question 3 of 5
Cell-associated differentiation antigens (CDs) are functional cell surface proteins or receptors that can be measured in situ.
Correct Answer: D
Rationale: All statements (A, B, C) about CDs are true, making D correct; CDs aid disease management, are low in serum, and many are known.
Question 4 of 5
An example of type III immune complex disease is:
Correct Answer: C
Rationale: Serum sickness is Type III, immune complex-mediated; not dermatitis , rejection , or atopy .
Question 5 of 5
Which of the following antibody is a prominent antigen receptor expressed on B Cells?
Correct Answer: C
Rationale: IgM is the main B-cell receptor with IgD; IgG is secreted later.