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AQA · GCSE · Biology

Mutations and their effects
Practice Questions

15 AQA GCSE Biology questions on Mutations and their effects, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Mutations and their effects.

Try 2 sample questions on Mutations and their effects

Question 1 · 1 mark · Difficulty 1/3

A mutation is a:

  1. Random change to the DNA base sequence
  2. Type of cell
  3. Loss of all chromosomes
  4. Form of respiration
Show answer & explanation
✓ Answer: ARandom change to the DNA base sequence
A mutation is a random change in the DNA base sequence, which can create a new allele.
Question 2 · 1 mark · Difficulty 2/3

What effect do MOST mutations have on the organism?

  1. Little or no effect on the phenotype
  2. Always harmful
  3. Always beneficial
  4. They always cause death
Show answer & explanation
✓ Answer: ALittle or no effect on the phenotype
Most mutations have no effect; some change the phenotype, and only rarely is one significantly beneficial or harmful.
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20 questions · 25 min · free

AQA GCSE Biology: Mutations and their effects FAQ

How many AQA GCSE Biology questions on Mutations and their effects are there on Kramizo?
Kramizo currently has 15 exam-board-aligned practice questions on Mutations and their effects for AQA GCSE 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 AQA 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 AQA GCSE 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 Mutations and their effects practice with other Biology topics or even switch to a totally different AQA 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 Mutations and their effects questions aligned to the official AQA GCSE Biology syllabus?
Every question is written against the published AQA GCSE Biology specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real AQA 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 AQA.
How is Mutations and their effects typically tested on AQA GCSE Biology papers?
Mutations and their effects appears across multiple question types on real AQA GCSE 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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