Person P receives a vaccine containing inactive pathogen X. Person Q receives an injection containing only monoclonal antibodies against X. Neither person has previously encountered X.
Several months later, the injected antibodies in Q have been broken down. Both people encounter X.
Which comparison is most likely?
P has specific memory lymphocytes; Q did not form them from the antibody injection.
Q has specific memory lymphocytes; P did not form them from the inactive pathogen.
Both have specific memory lymphocytes because antibodies and antigens trigger identical immune responses.
Neither has specific memory lymphocytes because both treatments contain no actively reproducing pathogens.
45 exam-style questions on Edexcel GCSE Biology 5.3 Immune system and medicines, covering 5.3.1 The specific immune system, 5.3.2 Response to immunisation, 5.3.3 Advantages and disadvantages of immunisation, 5.3.4 Antibiotics and bacterial infections, 5.3.5 Aseptic techniques in culturing, 5.3.6 Cross-sectional areas of cultures, 5.3.7 Stages of developing new medicines, and 5.3.8 Production of monoclonal antibodies. Each one has a worked solution and a mark scheme showing where the marks go.