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

Correct Answer: True
Cytotoxic T-lymphocyte-associated antigen 4 is also denoted as CTLA-4. It is a glycoprotein expressed by activated effector T cells. It plays a major role in repression of T cell proliferation and helps in enhancing the progressive ability of cell cycle. CTLA-4 also has some inhibitory functions which might produce irregular functioning of T cells. The most important clinical use of CTLA-4 is that it is targeted by antibodies therapeutically in human malignancies in order to block its inhibitory effects.

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.

Which is the right order of the steps involved in differentiation of T cells? i) Activated T cell generation into blast cell  ii) Proliferation of blast cell  iii) Differentiation of daughter cells  iv) Differentiation into subsets of 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

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.

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.

What is the major difference between Central memory T cells (TCM Cells) and Effector memory T cells (TEM Cells)?

Cytotoxic immune response of NK cells leads to the release of which cytotoxic molecules?

A solid-oxide fuel cell is fed with carbon monoxide and reacts with air to produce CO2. This reaction will produce 2 electrons which are used to power an electric circuit external to the fuel cell. The reaction equation is shown below: 2CO(g) + O2(g) -> 2CO2(g) ΔHr° = -565.96 kJ/mol This reaction does not occur for other types of fuel cells which use a catalyst, such as polymerelectrolyte membrane or phosphoric-acid fuel cells. The presence of carbon monoxide on the anode side of these types of fuel cells will cause catalyst poisoning, reducing the efficiency and voltage of the fuel cell. Determine the rate of enthalpy change for a carbon dioxide production rate of 208 mol/hr. The extent of the reaction occurring in the fuel cell can be obtained by the following equation: where:

Which of the following antigen factor is NOT considered for the activation and proliferation of B and T cells for carrying out the immune response?

Formation of a large number of effector cells against a particular antigen is called ______