Macrophages act as antigen-presenting cells by

  1. displaying the pathogen's antigens on their surface
  2. storing memory
  3. killing infected cells
  4. making antibodies
Answer

A) displaying the pathogen's antigens on their surface

They present antigens to lymphocytes. AS & A Level Biology · Topic 11 Immunity · 11.1 The immune system

Biology MCQ · More A Level Biology: Immunity MCQs · Practise