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Carbohydrate Digestion
Starch Digestion
Enzymes are specific; therefore it usually takes more than one enzyme to completely break
down a large molecule.

Typically one enzyme breaks down the molecule into smaller sections and then other
enzymes break down these sections further into their monomers.

These enzymes are usually produced in…

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In humans the process takes place as follows:

Food is taken into the mouth and chewed by the teeth
This breaks it into smaller pieces, giving it a large surface area

Saliva enters the mouth from the salivary glands and is thoroughly mixed with the
food during chewing

Saliva contains…

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Disaccharide Digestion
In addition to the digestion of maltose, there are two other common disaccharides in the
diet that need to be broken down.

Starch Digestion
In natural foods sucrose is usually contained within cells and there must be physically
broken down by the teeth in order to release it.…

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Lactose Intolerance
Lactose is a sugar found in milk and that is hydrolysed by the enzyme lactase.

Milk is the only food of young babies and so they produce relatively large amounts of

As milk forms a much smaller part of the diet in adults, the production of lactase…


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