Respiration

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  • Created by: Anon
  • Created on: 17-04-15 19:51
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  • Respiration
    • Glycolysis
      • 1. Glucose is activated by phosphorylation (addition of 2 phosphate molecules
      • 2. The glucose is converted to 2 molecules of TP (3 carbons)
      • 3. The TP is oxidised, converting NAD into NADH
      • 4. TP is converted into pyruvate (3 carbons)
      • Occurs in the cytoplasm and does not require oxygen
    • Link reaction
      • 1. Pyruvate is actively transported to the matrix of the mitochondria
      • 2. Pyruvate is oxidised to convert NAD to NADH
      • 3. An acetyl group (2 carbons) is formed from the pyruvate
      • 4. The acetyl group combines with CoA to give acetyl-CoA (2 carbons)
      • Pyruvate + NAD + CoA -> acetyl-CoA + NADH + CO2
    • Krebs cycle
      • 1. Acetyl-CoA combines with a 4 carbon molecule to give a 6 carbon molecule
      • 2. The 6 carbon molecule is converted back to the 4 carbon molecule to begin the cycle again
      • 3. During this cycle NADH, FADH, ATP and 3 molecules of carbon dioxide
    • Electron transport chain
      • 1. NADH and FADH donate electrons to begin the ETC
      • 2. Protons are also released and actively transported to the inner membrane of the mitochondria
      • 3. The electrons travel down the ETC losing energy as they go, this energy is used to synthesise ATP
      • 4. The protons that have accumulated in the inner membrane now diffuse back into the matrix
      • 5. The electrons then combine with the protons to make water

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