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Lineage commitment is a process in which CD4–CD8– (double negative) thymocytes differentiate to CD4– and/or CD8– T cells. 

Correct Answer: False
Lineage commitment is a very important developmental process which is subjected to the differentiation of CD4+CD8+ (i.e., double-positive) thymocytes into CD4+ and/or CD8+ T cells. There are various steps which lead to this differentiation process. The thymocytes are committed to differentiate and they do not change their fate. 

Which of the following statement(s) is/are CORRECT for antigen activated effector T cells?
P. CD4+ cells make contact with macrophages and stimulate their microbicidal activity.
Q. CD4+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
R. CD8+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
S. CD8+ cells make contact with virus infected cells and kill them.

The thymocytes that express both CD4 and CD8 surface markers are called as ________

Thymocytes that express only one of CD4 or CD8 surface markers are called as _______

What is the ratio of CD4+ cells to CD8+ cells?

CD11b+CD4+CD8–DCs belong to which type of dendritic cells? 

The lineage commitment of immature to mature T cells is mediated by which of the following receptor?

CD8 T cells proliferate and initially differentiate into which type of lymphocyte?

Which of the following statements are correct regarding common differences between plant and animal cells?
1. Plant cells have cellulose cell wall, while animal cells lack it.
2. Plant cells lack plasma membrane, while animal cells have it.
3. Mature plant cell have a large vacuole, while animal cells have numerous small vacuoles.

Immature double negative thymocytes are characterised by which of the following cell surface antigen?

The Double Negative thymocytes express the surface markers ___________