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National Biology

National Biology. Anaerobic Respiration. What do I know?. Find the fib In your groups come up with three statements One of these statements will be false You will then hand them in and the teacher will read them out to the class

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National Biology

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  1. National Biology Anaerobic Respiration

  2. What do I know? Find the fib • In your groups come up with three statements • One of these statements will be false • You will then hand them in and the teacher will read them out to the class • The groups will then try to find the fib – can you trick them ???

  3. What are we learning today? We are learning to: • Explain the difference between aerobic and anaerobic respiration in terms of energy • Explain the difference between the products of anaerobic respiration depending on the organism it occurs in • State when and where anaerobic respiration occurs

  4. What is anaerobic respiration? • Anaerobic respiration occurs when there is little or no oxygen • Anaerobic respiration occurs in the cytoplasm • In plants and yeast anaerobic respiration is also known as fermentation

  5. Anaerobic respiration in plants • When plants respire anaerobically they use glucose to produce carbon dioxide and alcohol

  6. Anaerobic respiration in yeast • When yeast respire anaerobically they use glucose to produce carbon dioxide and alcohol Water bath Layer of oil Lime water Boiled yeast + glucose Live yeast + glucose

  7. Analysis of Experiment • Why was it important that the water was boiled for this practical? • Why was a layer of oil added to both tubes? • Why were both tubes put in the same water bath? • Why was the rubber tubing clamped? • What conclusion(s) can you draw from your results? • How could the experiment be made more reliable?

  8. Anaerobic respiration in animals • When animals respire anaerobically they use glucose to produce lactic acid • Suggest some circumstances when this occurs

  9. How much energy is produced? • When you sprint 100m can you sustain that for a long time? • Does you body have enough energy? • Does your body have enough oxygen? • Anaerobic respiration does not provide cells with enough energy for it to be sustained for a long period of time • Anaerobic respiration stops after glycolysis therefore only provides 2 molecules of ATP

  10. Summary equations In plants and yeast (this is not reversible) Glucose pyruvic acid CO2+ alcohol (ethanol) In animals (this is reversible) Glucose pyruvic acid Lactic acid

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