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The nitrogen cycle
Practice Questions

40 AQA GCSE Biology questions on The nitrogen cycle, 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 The nitrogen cycle.

Try 2 sample questions on The nitrogen cycle

Question 1 · 1 mark · Difficulty 1/3

Roughly what proportion of the air is nitrogen gas?

  1. About 21%
  2. About 4%
  3. About 78%
  4. About 50%
Show answer & explanation
✓ Answer: C — About 78%
Despite that abundance, most organisms cannot use it directly.
Question 2 · 1 mark · Difficulty 1/3

In what form do plants absorb nitrogen from the soil?

  1. Nitrate ions
  2. Nitrogen gas
  3. Ammonia gas
  4. Protein molecules
Show answer & explanation
✓ Answer: A — Nitrate ions
They are taken up by active transport through the root hair cells.
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20 questions · 25 min · free

AQA GCSE Biology: The nitrogen cycle FAQ

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 The nitrogen cycle 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 The nitrogen cycle 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 The nitrogen cycle typically tested on AQA GCSE Biology papers?
The nitrogen cycle 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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