When the enzyme and substrate form a
complex, the structure of the enzyme is altered so that the active site of the enzyme fits
around the substrate.
Induced fit model
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A substance which slows down or stops a reaction by affecting the binding of
substrate to the enzymes.
Inhibitor
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Example of an irreversible inhibitors
which causes disulphide bonds within the protein structure to break.
Silver
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A non-protein compound required for the enzyme’s activity to occur.
Cofactor
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Similar in structure to the substrate molecule therefore they bind
to the active site of the enzyme, decreasing its activity as they compete with substrate for
the enzyme.
Competitive inhibitor
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Bind to the active site through hydrogen bonds and weak ionic
interactions.
Reversible inhibitors
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Where the non-competitive inhibitor binds to the enzyme.
Allosteric
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Inorganic metal ions which temporarily binds to the enzyme and alters its
active site, making the reaction more feasible.
Activators
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Permanently attached to the enzyme.
Prosthetic group
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Organic cofactors which do not bind permanently, which y facilitate the
binding of substrate to enzyme.
Coenzymes
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Substance containing a prosthetic group which contains iron, permanently bound to the molecule,
which serves as a means of binding oxygen.
Haemoglobin
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Other cards in this set
Card 2
Front
A substance which slows down or stops a reaction by affecting the binding of
substrate to the enzymes.
Back
Inhibitor
Card 3
Front
Example of an irreversible inhibitors
which causes disulphide bonds within the protein structure to break.
Back
Card 4
Front
A non-protein compound required for the enzyme’s activity to occur.
Back
Card 5
Front
Similar in structure to the substrate molecule therefore they bind
to the active site of the enzyme, decreasing its activity as they compete with substrate for
the enzyme.
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