Immunology practice questions

10 questions · Untimed · Explanation after each question

Immune system basics, antibodies and complement, autoimmune and immunodeficiency disease, transplantation, hepatitis, HIV and syphilis serology, and immunoassays. Immunology is 5–10% of the MLT exam and 5–10% of the MLS exam.

Line drawing of a 96-well microplate, a multichannel pipette and a plate reader

Before you start

Every question has four options and one correct answer. Each explanation says why the answer is right and why the most tempting wrong answer is wrong.
Check each answer to see the explanation before moving on. Checked answers cannot be changed.

Original practice questions written to the ASCP BOC MLT and MLS Examination Content Guidelines (revised June 9, 2026), not ASCP exam questions. Independent practice, not affiliated with or endorsed by the American Society for Clinical Pathology (ASCP), the ASCP Board of Certification or Pearson VUE. MLT(ASCP) and MLS(ASCP) are ASCP BOC credentials.