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HomeAQA GCSE BiologyRequired practical: effect of pH on enzyme activity
AQA · GCSE · Biology

Required practical: effect of pH on enzyme activity
Practice Questions

15 AQA GCSE Biology questions on Required practical: effect of pH on enzyme activity, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Required practical: effect of pH on enzyme activity

Question 1 · 1 mark · Difficulty 1/3

In the required practical, the enzyme amylase breaks down:

  1. Starch
  2. Protein
  3. Fat
  4. Glucose
Show answer & explanation
✓ Answer: AStarch
Amylase digests starch; iodine is used to detect when the starch has disappeared.
Question 2 · 1 mark · Difficulty 2/3

Iodine is used in this practical to:

  1. Test whether starch is still present
  2. Measure pH
  3. Heat the mixture
  4. Kill the enzyme
Show answer & explanation
✓ Answer: ATest whether starch is still present
Iodine turns blue-black with starch; when it stays orange-brown, the starch has been broken down by amylase.
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AQA GCSE Biology: Required practical: effect of pH on enzyme activity FAQ

How many AQA GCSE Biology questions on Required practical: effect of pH on enzyme activity are there on Kramizo?
Kramizo currently has 15 exam-board-aligned practice questions on Required practical: effect of pH on enzyme activity 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 Required practical: effect of pH on enzyme activity 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 Required practical: effect of pH on enzyme activity 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 Required practical: effect of pH on enzyme activity typically tested on AQA GCSE Biology papers?
Required practical: effect of pH on enzyme activity 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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