Choose the best description of an antigen.
A) part or a piece of a disease or pathogen
B) a particle that triggers the adaptive immunity
C) a particle (typically a foreign protein) that triggers inflammation
D) a chemical that enhances or modifies immune response

Question

Quizplus · Accepted Answer

An antigen is a particle that triggers the adaptive immune response. It is recognized as foreign by the immune system and leads to the production of specific antibodies to fight against it. Option A is partially correct, but not all antigens necessarily come from pathogens. Option C is incorrect as not all antigens trigger inflammation. Option D is also incorrect, as no antigen itself enhances or modifies the immune response, but rather triggers it.

Choose the Best Description of an Antigen