Final answer:
False. IFN-gamma secreted by T cells and natural killer cells helps B cells to multiply and mature into antibody-producing plasma cells.
Step-by-step explanation:
False. IFN-gamma, or interferon-gamma, is a cytokine that is primarily produced by activated T cells and natural killer cells. It plays a role in activating immune responses and can help B cells in their maturation into antibody-producing plasma cells.
Plasma cells are a type of B cell that secretes antibodies. The process of B cell differentiation into plasma cells is primarily influenced by cytokines secreted by T cells and natural killer cells.
Therefore, the correct statement would be: IFN-gamma secreted by T cells and natural killer cells helps B cells to multiply and mature into antibody-producing plasma cells.