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Enzymes
Year 12 Enzymes Project

Enzymes are organic catalysts. This means that they speed up the rate of a chemical
reaction without being used up themselves. They are very specific and only work with
certain substrates. A substrate the substance that the enzyme combines with. Each
enzyme is responsible for…

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The induced fit model is a modification of the lock and key model. The enzyme
molecule changes shape as the substrate molecules gets close. The change in shape is
'induced' by the approaching substrate molecule. This is because the molecules are
flexible because single covalent bonds are free to rotate.…

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to the concentration of enzymes.
However if the substrate concentration increases but the concentration of enzyme
molecules stays the same the rate of reaction will increase as substrate concentration
increases but only up until the point where all enzyme molecules are being used. This
is the point of saturation. The…

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Oxidoreductases these enzymes catalyse oxidation and reduction of hydrogen. An
example of an Oxidoreductases is succinate dehydrogenase.

Transferases these enzymes catalyse the transfer of a group from one compound to
another. An example of Transferases is aminotransferase.

Hydrolases these enzymes catalyse hydrolysis. An example of hydrolases is sucrase.

Lyases these…

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