logo

Learning objective

Identify the functions of microorganisms in the nitrogen cycle, specifically in decomposition, nitrification, nitrogen fixation, and denitrification, without needing to name specific bacteria.

Read the explanation, check the common trap, then practise with flashcards and questions.

Practise this topicRead the exam answerTopic hub

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE BiologyOrganisms and their environmentSupplement content

Study support

Understand this objective

Quick explanation

Identify the functions of microorganisms in the nitrogen cycle, specifically in decomposition, nitrification, nitrogen fixation, and denitrification, without needing to name specific bacteria

  • This point belongs to Nutrient cycles, especially Nutrient cycles outcomes.
  • You need to be able to identify the functions of microorganisms in the nitrogen cycle, specifically in decomposition, nitrification, nitrogen fixation, and denitrification, without needing to name specific bacteria.
  • The key ideas to know are State.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

State

Why it matters

This objective helps connect Nutrient cycles outcomes to exam-style questions, flashcards, and revision notes for Nutrient cycles.

Revision tools

Choose how to practise

Back to topic hub
Flashcards10 linked cards

Flashcard 1 of 10

Press Space to flip, arrows to move
Practice Questions7 linked questions

Question 1 of 7

Choose an answer, get feedback, then move sideways through the set.

0 of 5 attempted

Paper 4 structured question: Nutrient cycles

Paper 4Theory (Extended)2 marks

Description

Functions of Microorganisms in the Nitrogen Cycle

Microorganisms contribute to decomposition, nitrification, nitrogen fixation, and denitrification, each playing a role in recycling nitrogen in ecosystems.

  1. a

    Identify one function of microorganisms in the nitrogen cycle related to decomposition.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    State one function of microorganisms in the nitrogen cycle related to nitrification.

    Aim for approximately 1 distinct marking point.

    [1]
Revision notestopic notes

Open the full topic revision notes when you are ready to review this objective in context.

Open revision notes

Related learning objectives

Revision hubs

Move back to a broader study route

Cambridge IGCSEBiology resources