Enzymes are proteins that act as biological catalysts. Catalysts accelerate chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products.
a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
they are protein made up of amino acids
there shape is effected on ph and tempature
and the names of them usually end in "ase"
If you need more info I have a book of notes and am happy to share