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The process is much more detailed but I tried to summarise it as much as possible.

The mitochondria breaks down food molecules to make ATP.

Food mloecules ( carbohydrates) are broken down by amylases in the mouth and stomach to maltose and glucose. Glucose diffuses into the cells cytoplasm to be respired (either aerobically or anaerobically).

respiration is basically the oxidation of glucose to release energy.

Respiration of glucose occurs in $ main stages :

  1. Glycolysis

    glucose is activated by phosphorylation and it's "lysis" occurs. (a 6 carbon sugar is broken into 2 3 carbon sugars known as Pyruvate.

  1. Link reaction

    the two pyruvates then diffuse into mitochondrial matrix to be dehydrogenated and decarboxylated to form two Acetyl Co-enzyme A ( a 2 carbon sugar)

  1. Citric acid cycle (Krebs cycle)

    Acetyl Co A (2 Carbons) is added to oxaloacetate (4 Carbons) which then undergoes a series of oxidations and decarboxylations ( Redox Reactions) through which reduced NAD molecules are formed.

  1. Oxidative Phosphorylation

    Reduced NAD then move to the inner membrane of mitochondria to regenerate NAD as they release hydrogen to the Electron Transfer Chain within the membrane. Chemiosmotic theory applies here and ATP is formed by combination of ADP and inorganic Phosphates catalysed by stalked particles (ATP Synthase)

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13y ago

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