Pathology A super-antigen is a bacterial product that A Binds to B7 and CD28 co-stimulatory molecules B Binds to the beta chain of TCR and MHC class II molecules of APC stimulating T cell activation C Binds to the CD4 + molecule causing T cell activation D Is presented by macrophages to a larger-than-normal number of T helper CD4 + lymphocytes 💡 Explanation A super-antigen is a bacterial product that ✓ Correct Answer: B. Binds to the beta chain of TCR and MHC class II molecules of APC stimulating T cell activation