Who this is for: Cambridge IGCSE Biology (0610) students who want active transport — movement against a concentration gradient using energy — to become a reliable source of marks instead of a label they apply to any uphill movement.
What query it owns: how to understand and revise active transport in Cambridge IGCSE Biology (0610).
Why this is safe: this page owns the active transport revision-guide angle, while Tutopiya’s Active Transport subtopic page owns the learning resource and the free Active Transport quiz owns the practice.

Active transport appears in almost every Cambridge IGCSE Biology (0610) paper that tests Movement into and out of cells — often alongside diffusion and osmosis in compare questions, or in context of mineral ion uptake by root hair cells and glucose absorption in the small intestine. Examiners expect you to state that movement is against the concentration gradient and that energy from respiration is required. This guide explains the core ideas, typical question stems, and where to practise.

Key takeaways

• Active transport moves substances against a concentration gradient (low → high concentration).
• It requires energy from respiration (ATP) and involves carrier proteins in the cell membrane.
• Classic examples: mineral ions into root hair cells, glucose absorption in the ileum, reabsorption in kidney tubules.
• Always contrast with diffusion (passive, down gradient) and osmosis (water only, passive).

What is active transport in Cambridge IGCSE Biology?

Active transport is the movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration, against the concentration gradient, using energy from respiration. In Cambridge IGCSE Biology (0610) it explains how plants absorb mineral ions when soil concentration is lower than inside the root hair cell, and how the body recovers useful molecules when concentrations would favour the opposite direction.

Read the full notes on Tutopiya’s Active Transport subtopic page before attempting questions.

The core ideas you must master

Idea	What it means	How the exam uses it
Against gradient	Low → high concentration	”Against the concentration gradient”
Energy from respiration	ATP powers carrier proteins	”Requires energy”
Carrier proteins	Membrane proteins that pump specific substances	”Through carrier proteins”
Selective uptake	Specific ions or molecules	”Nitrate ions into root hair cells”

How to answer active transport questions — step by step

1. Identify the substance — ions, glucose, amino acids (not water for osmosis).
2. State the direction — low concentration to high concentration.
3. Name the process — active transport, against the gradient.
4. Add the energy source — energy from respiration / ATP.
5. Mention carrier proteins when the mark scheme expects membrane mechanism detail.
6. Link to the organ — root hair cell, villus, kidney tubule as appropriate.

Test yourself with the free Active Transport quiz.

Active transport vs diffusion vs osmosis

Process	What moves	Direction	Energy needed?
Diffusion	Particles / gases / dissolved substances	High → low concentration	No
Osmosis	Water only	High → low water potential	No
Active transport	Ions, glucose, etc.	Low → high concentration	Yes — from respiration

Active transport in past-paper wording: command words that matter

Command word / phrase	What the question wants	Typical stem
Define	Precise meaning	”Define active transport.”
Explain	Mechanism + reason	”Explain how root hair cells absorb nitrate ions.”
Compare	Two processes side by side	”Compare diffusion and active transport.”
Suggest	Apply to context	”Suggest why active transport stops when roots are waterlogged.”
Describe	What happens, no deep why	”Describe the role of carrier proteins.”

Worked exam-style stems (how to answer the wording)

1. “Define active transport.” Movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration, against the concentration gradient, using energy from respiration. Reward: against gradient + energy stated.
2. “Explain how mineral ions are absorbed by root hair cells when the concentration in the soil is lower than in the cell.” Ions are at lower concentration in soil → cannot enter by diffusion alone → active transport pumps ions through carrier proteins using energy from respiration. Reward: against gradient + energy + root context.
3. “Compare diffusion and active transport.” Both across membranes; diffusion is passive down gradient, active transport is against gradient and needs energy from respiration. Reward: direction and energy contrast.

Work the Movement topical past paper questions and Active Transport quiz.

How active transport connects to the rest of Biology (0610)

Active transport links plant nutrition (mineral ions), human nutrition (glucose in villi), and excretion (kidney reabsorption). It sits beside Diffusion and Osmosis in the Movement unit. Use the Cambridge IGCSE Biology resource hub to revise all three.

Common mistakes students make

• Saying active transport moves substances down the gradient.
• Forgetting energy from respiration in explain answers.
• Treating any uphill movement as active transport without naming membrane transport.
• Confusing facilitated diffusion (not on all syllabuses at equal depth) with active transport — at IGCSE, emphasise energy requirement.
• Using active transport to explain water uptake — water crosses by osmosis.

When you need more support

If compare questions or root hair cell explanations keep losing marks, use the Movement topical past paper questions and Active Transport quiz, then book a Cambridge IGCSE Biology tutor.

Frequently asked questions

Is active transport harder than diffusion in IGCSE Biology? The definition is longer because you must include direction and energy; practise compare tables until both are automatic.

Does active transport need oxygen? Indirectly — respiration needs oxygen for aerobic ATP production; waterlogged roots reduce oxygen and slow active transport.

What examples should I memorise? Root hair mineral ions, glucose in small intestine, kidney reabsorption — these appear repeatedly.

How do I revise active transport quickly? Use the Active Transport flashcard and quiz, then attempt compare stems from topical past papers.

Ready to master Cambridge IGCSE Biology active transport?

Start with the Active Transport subtopic page, then book a free trial with a Cambridge IGCSE Biology specialist.

Ready to Excel in Your Studies?

Get personalised help from Tutopiya's expert tutors. Whether it's IGCSE, IB, A-Levels, or any other curriculum — we match you with the perfect tutor and your first session is free.

Book Your Free Trial