Final answer:
An enzyme that specifically binds to and acts on one particular substrate exhibits absolute specificity. While 'monosubstrate enzyme' is not a standardized term, it is the closest choice to the concept being described.
Step-by-step explanation:
When an enzyme binds specifically to one substrate and catalyzes a single chemical reaction, it exhibits absolute specificity. This type of enzyme is known to act on one particular substrate only. These enzymes ensure that the biochemical reactions they catalyze are highly efficient and specific to the substrate they are meant to interact with. Given the choices provided in the question, the most appropriate term for an enzyme that has only one substrate is not directly listed in the common terminology; however, based on the context, 'monosubstrate enzyme' would be a reasonable choice to convey the concept of an enzyme working with a single substrate even though it is not a standardized term in biochemistry.