Question

multiple-choice question
unlike mhc 1 proteins, mhc 2 proteins present
pieces of the antigen from the antibody
pieces of the pathogen from the antigen
pieces of the antibody from the antigen
pieces of the antigen from the pathogen
rewatch

Explanation:

MHC class II proteins are expressed on antigen-presenting cells and function to present fragments of exogenous antigens (derived from extracellular pathogens) to helper T cells. The correct option describes presenting antigen pieces sourced from the pathogen, which aligns with MHC II's role, unlike MHC I which presents endogenous (intracellular) antigens. The other options incorrectly mix up the source (antibody vs pathogen) and direction of antigen presentation.

Answer:

pieces of the antigen from the pathogen