proteins

Proteins are made from long chains of different amino acids. Enzymes are a type of protein that speeds up the chemical reactions inside cells. Each type of enzyme does a specific job. Enzymes work best at optimum temperatures and pH values. Mutations can affect the ability of a protein to work properly.

Proteins are polymers, relatively large molecules made from many smaller molecules. 

Each protein molecule is built up from amino acids, smaller monomer molecules that join end to end to make the protein polymer molecule.

Each protein has its own number and sequence of amino acids. This gives each protein molecule a particular shape, allowing it to carry out a particular function).

Structural=CollagenHormone=InsulinCarrier molecule=HaemoglobinEnzyme=Amylase

Enzymes are biological catalysts – protein molecules that speed up chemical reactions. They catalyse chemical reactions in living cells such. Examples of these chemical reactions are: Respiration Photosynthesis Protein synthesis

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The shape of an enzyme determines how it works. Enzymes have active sitesthat substrate molecules (the substances involved in the chemical reaction) fit into when a reaction happens.

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