Edexcel A Level Biology A (Salters-Nuffield)
Edexcel A Level Biology A (Salters-Nuffield) Topic 6: The Immune Response Exam Questions
Free Edexcel A Level Biology A (Salters-Nuffield) exam questions on Topic 6: The Immune Response, with mark schemes. Covers non-specific defences, phagocytosis, the specific immune response, B cells, T cells and immunity.
Topic 6: The Immune Response exam questions
These packs of real past exam questions cover the whole of Topic 6: Immunity, Infection and Forensics, including Topic 6: The Immune Response. Work through every question on this sub-topic, then mark your answers against the mark scheme.
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Edexcel A Level Biology A (SNAB) 9BN0 Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
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About Edexcel A Level Biology A (Salters-Nuffield) Topic 6: The Immune Response
This part of Topic 6 explains how the body fights infection. Expect sequencing questions on the specific response.
What you need to know
- Non-specific defences Skin, mucus, lysozyme, inflammation, interferon and phagocytosis.
- Specific response Antigen-presenting cells activate T helper cells, which activate B cells and T killer cells.
- B cells Clonal selection produces plasma cells that secrete antibodies and memory cells.
- Immunity Natural and artificial, active and passive immunity, and vaccination.
Common mistakes in Topic 6: The Immune Response
- Saying antibodies kill pathogens directly.
- Confusing T helper and T killer cells.
- Mixing up active and passive immunity.
Try three Topic 6: The Immune Response exam-style questions
1. Describe the role of T helper cells. (2 marks)
Show the mark scheme answer
They bind to antigens on antigen-presenting cells (1) and release cytokines that activate B cells and T killer cells (1).
2. Explain why a second infection by the same pathogen is dealt with faster. (2 marks)
Show the mark scheme answer
Memory cells remain after the first infection (1), so antibodies are produced faster and in greater quantity (1).
3. Give one example of artificial passive immunity. (1 mark)
Show the mark scheme answer
Injecting antibodies, for example antitoxin for tetanus.
Topic 6: The Immune Response FAQs
What does this part of SNAB Topic 6 cover?
Non-specific and specific immune responses and types of immunity.
What is clonal selection?
Selection and multiplication of the lymphocyte with the complementary receptor to the antigen.
How do vaccines work?
They trigger a primary response so memory cells are made without the disease.
Revise this topic with flashcards: Edexcel A Level Biology A (SNAB) 9BN0 Flashcards, with mark scheme answers for Anki and Quizlet.
