Biology- respiration (CYCLE NOT LUNGS)

• The equation for aerobic respiration is glucose + oxygen -> carbon dioxide + water
• Glycolysis 


  • first stages of aerobic and anaerobic respiration

  • takes place in the cytoplasm
• What happens?


  •during glycolysis a molecule of Glucose is converted into 2 molecules of pyruvate
• Step 1- glycolysis


  • 2 ATP molecules break down into 2 ADP molecules

  • An enzyme adds the 2 phosphate groups into glucose (phosphorylation) , producing hexose bisphosphate
• Step 2- glycolysis 


  • Hexose bisphosphate breaks down into 2 triose phosphates
• Step 3- glycolysis 


  • each triose phosphate molecule is converted into pyruvate. This step Requires an additional phosphate group, making 2 ATP molecules per phosphate.

  • Oxidation also occurs on this step
• Oxidation (part of step 3) 


  • Triose phosphate is oxidised and the hydrogen lost is transferred is used to NAD, forming reduced NAD (NADH)

  •As triose phosphate loses hydrogen, this is also an example of dehydrogenation