Describe how a substrate interacts with an enzyme. Use the phrase lock and key in your description.

Enzymes bind with chemical reactants called substrates. There may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. In some reactions, a single-reactant substrate is broken down into multiple products. ... The enzyme's active site binds to the substrate. Enzymes interact with substrates because substrates fit into the active site of enzymes allowing them to carry out chemical reactions by lowering the EA (energy of activation level). Without substrates we wouldn't be able to do things like digest food.

one would be wind another would be water density