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Respiration (A-level only)
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ATP, redox and the big picture

ATP, redox and the big picture

Flowchart of respiration showing glycolysis in the cytoplasm, anaerobic branches to lactate or ethanol plus carbon dioxide, and aerobic stages in the mitochondrion Respiration is the enzyme-controlled release of energy from respiratory substrates in cells, with energy transferred to ATP. Glucose is the usual substrate, but lipids and amino acids can also feed into respiration.

Respiration (A-level only) Lesson

  1. A Level
  2. /Biology
  3. /Respiration (A-level only)

Step-by-step lessons covering AQA A Level Biology Respiration (A-level only) for A Level Biology. Each lesson works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.