aerobic respiration

is the process of creating ATP, which is required for metabolic reactions in the body

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  • glycolysis occurs in the cytoplasm of cells or in the sarcoplasm of muscle cells
  • glycogen is converted to glucose
  • glucose is phosphorylated twice to make a 6 carbon sugar phoaspate ( 2 ATPs are used to supply the p groups)
  • 6 carbon sugar phosphate breaks down to form 2 triosephosphate
  • hydrogen is removed from the triosphosphate to form pyruvate. (oxidation)
  • substrate level phosphorylation
  • net gan of 2 ATPs
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The link reaction

  • pyruvate from glycolysis is decarboxylated (loss of carbon dioxide which is released as the waste product)
  • it is then dehydrogenated (2H are removed)
  • this forms a 2 carbon compound molecule (acetly)
  • the 2H go on for reduce the coenzyme NAD
  • Acetly binds with coenzyyme A to form acetyl-coenzyme A, which is fed into krebs cycle
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krebs cycle

  • ·        acetyl-coenzyme A combines with a 4 carbon compound to form a six carbon compound
  • ·        this is then dehydrogenated (fours pairs of 2H are lost and used to reduce NAD)
  • ·        followed by decarboxylation ( loss of c02)
  • ·        4 c-compound from the start is regenerated
  • ·        Reduced NADs do into the electron transport chain.
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electron transport chain

1. reduced coenzyme caries h(ions) and electrons to the electron transport chain on the inner mitochondrial membrane

2. electrons pass from one carrier to the next in a series of oxidation and reduction (redox reactions)

3. protons(h ions) move across the inner mitochondrion membrane creating a high proton concetration in the intermembrane space

4. protons diffuse back into the mitochondrial matrix down the electrochemical gradient through the stalked particles

5. this movement allows ATpase to catalyse ATP sysnthesis

6. electrons and protons recombine to form hydrogen which combine with oxygen to form water.

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