lesson
Cells transfer energy through reactions
1 · Learn
Aerobic respiration uses glucose and oxygen, producing carbon dioxide and water while transferring energy for cell processes. Respiration happens in living cells; it is not another word for breathing. Plants as well as animals respire.
The word summary is glucose + oxygen -> carbon dioxide + water. Energy is transferred in the process, not created as a new material atom. Mitochondria are important sites of aerobic respiration in eukaryotic cells.
2 · Worked example
A plant in darkness cannot photosynthesise without light, but its living cells can continue to respire using stored substances and available oxygen.
3 · Your turn
Does a plant stop all respiration at night because photosynthesis needs light?
Check your answer
No. Respiration can continue; it is a different process from photosynthesis.
4 · Apply your learning
Compare the reactants, products and purposes of photosynthesis and aerobic respiration in a labelled table.
Adult guidance and safety
Use supplied evidence and approved diagrams. Practical work requires a qualified adult, suitable equipment and a risk assessment. No unsupervised chemicals, heating, flames, mains electricity or bright-light experiments. Human biology is factual education, not personalised medical advice; never request intimate or health disclosures.
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