messages.role: user
messages.content: answer the following sentence if true or false with explanation: T cells recognize and respond only to fragments of antigen displayed on the surface of body cells
messages.role: assistant
messages.content: False. T cells do recognize and respond to fragments of antigen, but these fragments are displayed on the surface of other cells, not necessarily body cells. Specifically, T cells recognize antigens presented by Major Histocompatibility Complex (MHC) molecules on the surface of antigen-presenting cells (APCs), such as dendritic cells, macrophages, and B cells. These APCs engulf pathogens, break them down into smaller fragments (antigens), and present them on their surface using MHC molecules. T cells then interact with these APCs to initiate an immune response.
messages.role: user
messages.content: can’t the sentence be true ?