OCR A Level Biology B (Advancing Biology)
OCR A Level Biology B (Advancing Biology) The Immune System Exam Questions
Free OCR A Level Biology B (Advancing Biology) exam questions on The Immune System, with mark schemes. Covers non-specific defences, phagocytosis, the specific immune response and antibodies.
The Immune System exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
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A Level Biology Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
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About OCR A Level Biology B (Advancing Biology) The Immune System
This topic covers how the body fights infection.
What you need to know
- Non-specific defences Skin, mucous membranes, inflammation and phagocytes.
- Lymphocytes T helper, T killer, B cells and memory cells.
- Antibodies Structure and action such as agglutination.
- Immunity types Active, passive, natural and artificial.
Common mistakes in The Immune System
- Confusing antigen and antibody.
- Saying T cells make antibodies.
- Mixing primary and secondary response.
Try three The Immune System exam-style questions
1. State the role of T helper cells. (1 mark)
Show the mark scheme answer
Release cytokines that activate B cells and T killer cells.
2. Describe phagocytosis. (2 marks)
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The phagocyte engulfs the pathogen into a phagosome (1), which fuses with a lysosome to digest it (1).
3. Explain why the secondary response is faster. (1 mark)
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Memory cells are already present.
The Immune System FAQs
What does The Immune System cover?
Non-specific and specific immune responses.
What is an antigen?
A molecule that triggers an immune response.
What are monoclonal antibodies?
Identical antibodies from one clone of B cells.
Revise this topic with flashcards: A Level Biology Flashcards, with mark scheme answers for Anki and Quizlet.
