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Indented area on the surface of an enzyme molecule, with a shape that is complementary to the shape of the substrate molecule
Chemical that speeds up the rate of reaction and remains uncharged and reusable at the end of the reaction
Outside the cell
Inside the cell
The chemical reactions that take place inside living cells and organisms
Molecule produced from substrate molecules, by an enzyme-catalysed reaction
Molecule that is altered by an enzyme-catalysed reaction
A substrate that has to be present to ensure that an enzyme-catalysed reaction takes place at the appropriate rate
Complex formed by temporary binding of enzyme and substrate molecules during an enzyme-catalysed reaction
Enzyme molecule with product molecule(s) in its active site
Number of molecules per unit volume
Where the inhibitor molecule has a similar shape to that of the substrate molecule and completes with the substrate for the enzyme's active site. It blocks the active site and prevents formation of enzyme-substrate complexes.
A substance that reduces or stops a reaction
Where the competitor molecule attaches to a part of the enzyme but not the active site. This changes the shape of the active site, which prevents ES complexes forming, as the enzyme active site is no longer complementary in shape to the substrate molecule