Enxymes are biological catalysts which help speed up useful chemical reactions in the body.
Enzymes are all proteins; all proteins are made up of amino acids- these are folded into unique shapes which enzymes need to do their job.
proteins also act as structural components of tissue; eg hormones and antibodies.
LOCK AND KEY MODEL.
- chemical reactions: joined together or split apart
- substrate: a molecule that is changed in a reaction
- every enzyme has an active site which a substrate joins.
- enzymes only usually speed up one reaction this is because a substrate has to be the correct shape to fit into an active site.
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