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Question

Helper cells are distinguished from cytotoxic T-cells by the presence of

A
CD 2
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B
CD 4
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C
CD 3
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D
IL-2 receptor
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Solution

The correct option is B CD 4
  • T-cells are a type of white blood cell that plays a central role in cell-mediated immunity.
  • T-helper cell assists other white blood cells in immunologic processes, including maturation of B cells into plasma cells and memory B cells and activation of cytotoxic T cells and macrophages. These cells are also known as CD4+ T cells because they express the CD4 glycoprotein on their surfaces.
  • Cytotoxic T-cells destroy virus-infected cells and tumour cells and are also implicated in transplant rejection. These cells are also known as CD8+ T cells since they express the CD8 glycoprotein at their surfaces.
  • So, the correct answer is 'CD 4'.

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