Steps of catalytic cycle of an enzyme action are :
(a) The substrate binds to the active side of the enzyme.
(b) This binding of the substrate induces the enzymes to alter its shape and fit more closely around the substrate.
© The active site of the enzyme, now is in close proximity of the substrate breaks the chemical bonds of the substrate and an enzyme-product complex is formed.
(d) The enzyme releases the products of the reaction
and the free enzyme is ready to take up another molecule of the substrate