Final answer:
Proteins that do not require antigen processing and presentation are referred to as T-independent antigens.
Step-by-step explanation:
Proteins that do not require antigen processing and presentation are referred to as T-independent antigens. These antigens, such as polysaccharides and lipopolysaccharides, can activate B cells without antigen processing and presentation to T cells. Unlike protein antigens, T-independent antigens do not require the B cell to function as an antigen-presenting cell (APC). Instead, B cells can recognize native, unprocessed T-independent antigens.