The earliest identifiable cells of T-Cell lineage during maturation are_______________?
Correct answer: A. CD7+ Pro-T-Cells
- A. CD7+ Pro-T-Cells
- B. CD5+ Pre-T-Cells
- C. CD8+ Pro-T-Cells
- D. CD8+ Pre-T-Cells
Explanation
CD7 is the earliest reliable T-lineage marker and appears on pro-T cells before the later CD4 or CD8 stages. CD5 and CD8 are acquired later during thymic maturation.
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