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Diseases and Immunity
Practice Questions

20 CIE IGCSE Biology questions on Diseases and Immunity, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Diseases and Immunity

Question 1 · 1 mark · Difficulty 1/3

A student investigated the effect of disinfectants on bacterial growth. Four paper discs were soaked in different disinfectants and placed on an agar plate covered with bacteria. After 48 hours, clear zones appeared around each disc. Which statement correctly explains why clear zones formed?

  1. The disinfectant stimulated bacterial reproduction in those areas
  2. The bacteria were killed or their growth was inhibited by the disinfectant
  3. The agar provided nutrients only outside the clear zones
  4. Oxygen could not reach the bacteria near the discs
Show answer & explanation
✓ Answer: B — The bacteria were killed or their growth was inhibited by the disinfectant
Award 1 mark for recognizing that disinfectants kill bacteria or inhibit their growth, creating zones where bacteria cannot survive. A is incorrect because disinfectants do not stimulate bacterial growth. C is incorrect because agar composition is uniform across the plate. D is incorrect because oxygen availability does not create clear zones in this investigation.
Question 2 · 1 mark · Difficulty 2/3

In a vaccination programme in Kenya, children were immunized against measles. The vaccine contained weakened measles virus. Which of the following best describes what happens after the vaccine is injected?

  1. Red blood cells immediately destroy the virus
  2. The child develops symptoms of measles but recovers quickly
  3. Lymphocytes produce specific antibodies and memory cells are formed
  4. Phagocytes engulf the virus and no other immune response occurs
Show answer & explanation
✓ Answer: C — Lymphocytes produce specific antibodies and memory cells are formed
Award 1 mark for recognizing that vaccination triggers lymphocytes to produce specific antibodies and establish immunological memory through memory cells. A is incorrect because red blood cells do not destroy pathogens. B is incorrect because weakened vaccines typically do not cause disease symptoms. D is incorrect because phagocytosis is only part of the immune response; specific antibody production is essential for vaccination effectiveness.
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20 questions · 25 min · free

CIE IGCSE Biology: Diseases and Immunity FAQ

How many CIE IGCSE Biology questions on Diseases and Immunity are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Diseases and Immunity for CIE IGCSE Biology, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CIE paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CIE IGCSE students preparing for Biology?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Diseases and Immunity practice with other Biology topics or even switch to a totally different CIE subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Diseases and Immunity questions aligned to the official CIE IGCSE Biology syllabus?
Every question is written against the published CIE IGCSE Biology specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CIE paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CIE.
How is Diseases and Immunity typically tested on CIE IGCSE Biology papers?
Diseases and Immunity appears across multiple question types on real CIE IGCSE Biology papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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