ATI RN
Ricci Maternity and Pediatrics NCLEX Question Immunization Questions
Question 1 of 5
Which of the following best describes cross-reactivity?
Correct Answer: B
Rationale: Cross-reactivity occurs when one antibody binds multiple similar antigens due to shared epitopes.
Question 2 of 5
If alternative processing uses the first polyadenylation site, then what type of heavy chain mRNA is derived?
Correct Answer: D
Rationale: Using the first polyadenylation site results in μ (mu) heavy chain mRNA, encoding IgM.
Question 3 of 5
Comparing the arrangement of TCR genes and BCR genes, the chain is analogous to the heavy (H) chain and the chain is analogous to the light (L) chain.
Correct Answer: B
Rationale: In TCRs, the beta (β) chain is analogous to the heavy chain, and the alpha (α) chain is analogous to the light chain.
Question 4 of 5
T cells the potential to express an alternative secreted form like the B-cell antigen receptor. Superantigens can activate T cells antigen processing and presentation.
Correct Answer: D
Rationale: T cells do not secrete receptors and superantigens activate them independently of antigen processing.
Question 5 of 5
CD4 and CD8 enhance the response of specific T cells, both by stabilizing the TCR-peptide-MHC complex and by bringing what type of protein kinase into the proximity of the cytoplasmic tails, thereby facilitating signal transduction and cell activation?
Correct Answer: D
Rationale: Tyrosine kinases (e.g., Lck) are brought into proximity by CD4 and CD8 for signal transduction.