Biology 9700 · AS & A Level · The immune system

The immune system — practice question

If an antigen enters the body again, memory cells trigger a secondary immune response. Which option shows the secondary immune response correctly?

    Worked solution & mark scheme

    This 1-mark question has a full step-by-step worked solution and mark scheme.

    • Full mark scheme, point by point
    • Step-by-step worked solution
    • Write your answer & get it marked instantly by AI