Kramizo
Log inSign up free
Home › CIE IGCSE Biology › Gas Exchange
CIE · IGCSE · Biology

Gas Exchange
Practice Questions

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

⚡ Start Quiz on Gas Exchange →Try one question

Try 2 sample questions on Gas Exchange

Question 1 · 1 mark · Difficulty 1/3

Which feature of alveoli is most important for efficient gas exchange?

  1. They contain cartilage rings to prevent collapse
  2. They have a large total surface area
  3. They are lined with ciliated epithelial cells
  4. They produce mucus to trap pathogens
Show answer & explanation
✓ Answer: B — They have a large total surface area
Award 1 mark for correct answer. Large surface area increases the rate of diffusion. A is incorrect — alveoli do not contain cartilage; this is a feature of the trachea and bronchi. C is incorrect — ciliated cells are found in the trachea and bronchi, not alveoli. D is incorrect — alveoli do not produce mucus as this would impair gas exchange.
Question 2 · 1 mark · Difficulty 2/3

A student investigated the effect of exercise on breathing rate. The student's breathing rate at rest was 12 breaths per minute. After running for 5 minutes, the breathing rate increased to 36 breaths per minute. What is the percentage increase in breathing rate?

  1. 24%
  2. 67%
  3. 200%
  4. 300%
Show answer & explanation
✓ Answer: C — 200%
Award 1 mark for correct calculation. Method: (36 - 12) / 12 × 100 = 24/12 × 100 = 200%. A is incorrect — this is the absolute increase, not the percentage. B is incorrect — this would be (36-12)/36 × 100, using the wrong denominator. D is incorrect — this is 36/12 × 100, which does not subtract the original value.
⚡ Start a Quiz on Gas Exchange →
20 questions · 25 min · free

CIE IGCSE Biology: Gas Exchange FAQ

How many CIE IGCSE Biology questions on Gas Exchange are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Gas Exchange 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 Gas Exchange 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 Gas Exchange 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 Gas Exchange typically tested on CIE IGCSE Biology papers?
Gas Exchange 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.

Lock in Gas Exchange before exam day.

Start practising in 30 seconds — no card required.

⚡ Start Quiz Free →