A Level Biology - Enzymes 2.4

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

Temperature coefficient

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