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Brainlag Learn / GCSE Biology

Bioenergetics: photosynthesis and respiration

Photosynthesis and its rate, limiting factors and the pondweed practical, aerobic and anaerobic respiration, exercise and metabolism.

Lessons

  1. Photosynthesis: the equation and the glucose it makesHow plants turn carbon dioxide and water into glucose and oxygen using light, why that is endothermic, and what happens to the glucose. 20 min, free
  2. Rate of photosynthesis and limiting factorsThe pondweed and lamp practical, rate from gas volume or bubble counts, the inverse square law for light, and reading limiting factor graphs. 25 min, free
  3. Aerobic and anaerobic respirationRespiration releases energy from glucose: with oxygen in mitochondria, or without it as lactic acid in muscles and ethanol in yeast. 25 min, Plus
  4. The response to exerciseHow heart rate, breathing rate and breath volume change in exercise, working with the data, and oxygen debt. 20 min, Plus
  5. Metabolism and measuring respirationThe reactions that build and break down molecules in cells, the liver's job with lactic acid, and measuring respiration rate with a respirometer. 20 min, Plus

Practise and test

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