Cellular Respiration

  • Created by: Catr08
  • Created on: 26-03-21 14:19

Cellular Respiration:

oxydation: gain of oxygen/loss of electrons, hydrogens

reduction: loss of oxygen/gain of electrons, hydrogens

1. Glycolysis: 

  • Occurs in the cytosol/cytoplasm
  • Phosphorylation of glucose by ATP --> less stable
  • 6C sugar splits (lysis) into 2x 3C sugars
  • 3C sugars are oxidised (loss of hydrogen/electrons, gain oxygen) to form reduced carriers (NADH)
  • Products of glycolysis: 2 pyruvates and 2 ATP
  • !Important Note: glycolysis occurs in aerobic and anaerobic respiration!

Aerobic respiration:

2. Link Reaction:

  • Pyruvates go from the cytosol/cytoplasm to the matrix of the mitochondria
  • pyruvate is oxidised, produces reduced carriers NADH
  • Pyruvate is decarboxylated to form acetyl CoA, CO2 is produced

3. Krebs Cycle

  • Acetyl CoA combined with 4C compound forms 6C
  • 6C compound broken down into original 4C --> CO2 is produced (decarboxylation)
  • This involves oxidation reactions


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