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Glucose + oxygen carbon dioxide + water + energy C6H12O6 + 6O2 6CO2 + 6H2O + energy
Respiration The process by which complex organic molecules are broken down to release energy
ATP (adenosine triphosphate) 3 phosphate groups + 1 adenosine molecule
ATP ADP + Pi
cell needs to possess mitochondria
Glycolysis, link reaction, Krebs' cycle, electron transport chain
Requires oxygen to fully oxidise the organic molecule. This releases lots of energy.
1. Glycolysis (substrate level phosphorylation)
What = formation of pyruvic acid from glucose.
Where = cytoplasm of a cell.
2. Link reaction (occurs twice)
What = using pyruvate to produce acetyl coenzyme A
Where = matrix of mitochondrion
(substrate level phosphorylation)
What = removal of hydrogen from pyruvic acid.
Where = matrix of the mitochondria.
Electron/hydrogen carriers = NAD and FAD
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Electron transport chain / oxidative phosphorylation:
What = using hydrogen to produce ATP (see chemiosmotic theory).
Where = inner mitochondrial membrane.
Electron carriers = protein molecules found on the internal membrane of the mitochondria
last molecule in the chain = oxygen
occurs for however many NADHs you have, e.g. 10 NADH= 10H2O produced
All stages = 38 ATP produced per glucose molecule
The breakdown of the molecule without oxygen.…read more