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

Correct Answer: P, Q and S only

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

In a single link robotic arm the end-effector slides upward along the link with a velocity of 0.5 m/s while the link rotates about revolute joint with an angular speed of 1 rad/sec. When the end-effector is at a distance of 1 m from the joint, the acceleration experienced by the end-effector will be

A' gave 'B' a pen-drive which he knows has files that were infected with a virus. 'A' did not inform 'B' of the same. 'B' inserted the pen-drive into his computer and opened the files. His computer was infected by the virus, and most of the files on it were lost. Which of the following offences can 'A' be held guilty of?

Select the four statements about Plasmodium that are true. A)Inside an infected mosquito, haploid gametes fuse, forming a diploid zygote that develops into an oocyst B) Plasmodium cells infect two specific types of cells in humans. C) Inside an infected mosquito, haploid gametes fuse, forming a haploid zygote that develops into an oocyst. D) When a mosquito bites a human with malaria, diploid Plasmodium cells enter the mosquito. E) Plasmodium cells are transferred to humans through mosquito saliva. F) The life cycle of Plasmodium involves only haploid forms. G) The complete life cycle of Plasmodium requires two hosts.

Cytotoxic T-lymphocyte-associated antigen 4 is expressed by activated effector T cells and it represses the proliferation of T cell.

Which of the following statements about immune response are correct?
P. T cells are activated by antigen-presenting cells.
Q. Foreign peptides are not presented to helper T cells by class II MHC proteins.
R. Dendritic cells are referred to as professional antigenpresenting cells.

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

M-tropic viruses infect only CD4+ macrophages and not T cells.

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

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