Which macromolecule is responsible for catalyzing biochemical reactions?

The macromolecule which is responsible for catalyzing biochemical reactions would be proteins. Generally, substances that catalyzes reactions are called catalysts. One type of catalyst that is commonly used especially in biological systems are the enzymes. These catalysts are made up of proteins. So, the answer should be protein. Another important use of proteins would be it is the building block of every living cell that exists. Proteins are important for regulation, structural and other functions in all living organisms. Proteins are made up of amino acids that are linked with peptide bonds. Proteins are mostly made up of carbon, hydrogen, oxygen and nitrogen atoms.