Answer: enzymes
Explanation:
Enzymes are the special protein molecules present in the cells of the living organism. Enzymes do not participate as reactants in a chemical reaction instead they speed up the chemical reaction. This is the catalytic property of the enzyme. A substrate binds to the active site of the enzyme and gets converted into product. They play important role in respiration, digesting food, muscle and nerve function.
On the basis of the above description, Specialized proteins which function as catalysts for organic reactions are: enzymes.
