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Respiration

Glycolysis
Glycolysis is the initial stage of both aerobic and anaerobic respiration. It occurs in the cytoplasm
of all living cells and is the process by which a hexose sugar, usually glucose, is split into two
molecules of the 3-carbon molecule pyruvate .

1. Activation of glucose by phosphorylation.…

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The 2C molecule that is thereby formed combines with coenzyme A to produce acetyl CoA.

A carbon dioxide molecule is formed from each pyruvate.

pyruvate + NAD + CoA acetyl CoA + NADH + CO2


Reaction happens twice per molecule of glucose.


Krebs cycle
The Krebs cycle involves a series…

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Once pumped across the membrane, the protons cannot pass back through, therefore a high

concentration of H+ is present in the intermembrane space.
The protons therefore diffuse through a carrier protein which contains the enzyme ATP
synthase.
Energy from the diffusing protons also allows ADP to be phosphorylated to form…

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