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CIE · IGCSE · Biology

Antibiotics and other medicines
Practice Questions

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

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Try 2 sample questions on Antibiotics and other medicines

Question 1 · 1 mark · Difficulty 1/3

What is the correct definition of an antibiotic?

  1. A chemical that kills or inhibits the growth of viruses
  2. A chemical that kills or inhibits the growth of bacteria
  3. A chemical produced by the body to destroy pathogens
  4. A chemical that stimulates the immune system to produce antibodies
Show answer & explanation
✓ Answer: BA chemical that kills or inhibits the growth of bacteria
Antibiotics are chemicals that kill or inhibit the growth of bacteria. They do not work against viruses, which is a common student misconception. Antibodies, not antibiotics, are produced by the immune system.
Question 2 · 1 mark · Difficulty 2/3

A student tests four antibiotics (A, B, C, D) against a bacterial culture using paper discs. The results show the following zones of inhibition: A = 18 mm, B = 6 mm, C = 22 mm, D = 10 mm. Which antibiotic is most effective against this bacterium?

  1. Antibiotic A
  2. Antibiotic B
  3. Antibiotic C
  4. Antibiotic D
Show answer & explanation
✓ Answer: CAntibiotic C
A larger zone of inhibition indicates that more bacteria have been killed or inhibited, meaning the antibiotic is more effective. Antibiotic C produced the largest zone at 22 mm, so it is the most effective against this particular bacterium. Antibiotic B with only 6 mm is the least effective.
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CIE IGCSE Biology: Antibiotics and other medicines FAQ

How many CIE IGCSE Biology questions on Antibiotics and other medicines are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Antibiotics and other medicines 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 Antibiotics and other medicines 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 Antibiotics and other medicines 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 Antibiotics and other medicines typically tested on CIE IGCSE Biology papers?
Antibiotics and other medicines 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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