ATI RN
Pediatric Immunization NCLEX Questions Ricci Questions
Question 1 of 5
What color light is emitted when antigens are exposed to UV light after being treated with fluorescein isothiocyte (FITC), such as in the test for Treponema pallidum (syphilis) or to dye the Chicago river for a particular holiday (fluorescein)?
Correct Answer: D
Rationale: Fluorescein (FITC) emits green light when excited by UV light, commonly used in fluorescence microscopy and assays.
Question 2 of 5
In comparison toαβ T cells, δγ T cells and are hypothesized to be a line of immune defense.
Correct Answer: B
Rationale: δγ T cells do not typically use MHC for antigen recognition and are considered a primary line of defense.
Question 3 of 5
Allelic exclusion is a process by which the protein from only one allele is expressed while other allele(s) are silenced. Allelic exclusion occurs (generally) in which of the following?
Correct Answer: A
Rationale: Allelic exclusion occurs in B cells and TCR beta chains, but not typically in alpha chains.
Question 4 of 5
Genes involved in antigen processing
Correct Answer: D
Rationale: LMP and TAP genes are involved in antigen processing for MHC class I presentation.
Question 5 of 5
Because of a lack of genetic recombination in the MHC, blocks of alleles (haplotypes) are inherited together, and they are identical in families. Which of the following is the likely result of this?
Correct Answer: A
Rationale: Identical HLA haplotypes in families simplify tissue transplantation due to matched alleles.