3. As a budding tumor immunologist

3. As a budding tumor immunologist you are interested in the mechanism of tumorrejection. You develop an injectable sarcoma cell line through use of a mutagen thatdisrupt different genes at random so you can probe their potential effect on tumorsurvival. Tumor cell line 1 is quickly killed in wild type mice, but grows well in RAG2knock-out mice. Tumor cell line 2 is quickly killed in wild type mice and RAG2 knockoutmice, but grows well in perforin knockout mice. You vaguely recall that RAG2 is a geneinvolved in recombination of heavy and light chain segments in the immune system.Which cell type is likely directly mediating this tumor rejection, for each of the two celllines?A. Eosinophils; B cellsB. CD4 T cells; CD8 T cellsC. CD8 T cells; Natural killer cellsD. CD8 T cells; BasophilsE. Natural killer cells; CD8 T cells4. Consider the following figure, which describes the cross-sectional area of a mammalianeye.Which of the following statement is incorrectly matched with its characteristics andstructure?A. this structure is derived from neural ectoderm.B. this structure provides bloodC. this structure does not have visual receptorsD. this structure controls the amount of the lightE. this structure has the lowest visual acuity