Concept:Enzymes are specific in their action and act on particular substrates only.
Explanation:Protease J is an enzyme that digests protein substances.
Among the food substances shown in the diagram, only one matches the substrate of protease J.
The enzyme can react with this substance because its active site fits the substrate exactly.
This property of enzymes is known as specificity.
Different enzymes act on different substrates based on their shape and structure.
Protease J does not react with carbohydrates or lipids.
It reacts only with the particular illustrated protein substance.
Hence, the reaction occurs because enzymes are specific in their action.
Answer:B. are specific in their action
