SBA — Single Best Answer · Review
Question 620
Immunology → General
Classification
Question
SSBAQuestion Header
Which phenotype is compatible with a memory T lymphocyte?
Question Stem
Select the single best answer.
Options
A
CD19 only
B
CD16/CD56 with absence of CD3
C
CD68 only
D
CD66 only
E
CD4 or CD8
Explanation
Memory T lymphocytes may be CD4-positive or CD8-positive. Their presence contributes to the enhanced response following subsequent exposure to antigen.
Option Validity
A) CD19 is a B-lymphocyte marker.
B) CD3-negative cells expressing CD16/CD56 characterise natural killer cells.
C) CD68 is associated with macrophages.
D) CD66 is associated with granulocytes.
Further Reading
Saxena MRCOG-1 Basic Sciences — Immunology: T-lymphocyte functions, printed page 210.