Which of the tracing is NOT the role of T-cell receptor complex?
α and β chain
Answer: Option C
CD19 is a co-receptor of B-cell receptor complex while T-cell receptor complex consists of antigen recognizing α and β chains, expressed on the surface of T-cell in noncovalent association with CD3 molecule. CD40L and CD28 are co-stimulatory molecules.
Name the cytokines which act as a T-cell growth factor?
Answer: Option B
Cytokines released by T-helper cells and have several functions like IL-2 act as T-cell growth factor while IL-4 and IL-5 help in B-cell activation, IL-3 involved in hematopoiesis and secreted by both TH1 and TH2 subset of T-helper cell.