Question

a pathogenic antigen fragment must be displayed on the outside of a b cell to initiate a humoral response.
a true
b false

Explanation:

In the humoral immune response, B cells are activated when they bind to an antigen. After internalizing the antigen, they process it and display antigen fragments (peptides) on their surface using MHC class II molecules. This presentation is crucial for helper T cells to recognize and activate the B cell, initiating the humoral response (antibody production). So the statement is TRUE.

Answer:

a. TRUE