LIFE SCIENCE

Detailed explanation-1: -The adaptive immune system includes the T cells and B cells. Unlike the cells of the innate immune system, T cells and B cells can identify specific features of pathogens – or cancer. DNA provides the instructions for a cell’s growth, survival and reproduction.

Detailed explanation-2: -The T and B lymphocytes (T and B Cells) are involved in the acquired or antigen-specific immune response given that they are the only cells in the organism able to recognize and respond specifically to each antigenic epitope.

Detailed explanation-3: -T and B cells are activated when they recognize small components of antigens, called epitopes, presented by APCs, illustrated in Figure 2. Figure 2. An antigen is a macromolecule that reacts with components of the immune system. A given antigen may contain several motifs that are recognized by immune cells.

Detailed explanation-4: -There are two broad classes of such responses-antibody responses and cell-mediated immune responses, and they are carried out by different classes of lymphocytes, called B cells and T cells, respectively.