IGCSE Biology / Life processes

Active transport revision notes

Edexcel International GCSE Biology (4BI1), chapter 1: Life processes, specification point 2.15. Part of the full course.

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Active transport moves particles against their concentration gradient, using energy released by respiration and carrier proteins. It allows cells to take up or move substances even when diffusion would move them in the opposite direction.

More lessons in Life processes

• The characteristics of living organisms
• Animal and plant cells under the microscope
• The light microscope and magnification
• Temperature, pH and denaturing
• Practical: measuring enzyme activity
• Anaerobic respiration and how it differs from aerobic
• Practical: enzymes and food
• Aerobic respiration and ATP
• Practical: showing that respiring seeds give out carbon dioxide and heat
• Diffusion
• Osmosis
• What changes the rate of movement
• Stem cells and differentiation
• Cells, tissues, organs and systems
• Enzymes and the active site