Answer - (Fossilize) is the suffix
Reason - The suffix can be added because such as fight-ing or fossil-ize it can be added to grammatical case of nouns.
No it isnt a rational nu7mber.
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.