The organic compounds that are tightly attached to the protein part of an enzyme to make them catalatically active are called -------------------.

Step-by-step solution

According to NCERT Biology, cofactors are non-protein constituents bound to the enzyme to make it catalytically active. There are three kinds of cofactors: prosthetic groups, co-enzymes, and metal ions. Prosthetic groups are organic compounds that are distinguished from other cofactors in that they are tightly bound to the apoenzyme (the protein part of the enzyme). Co-enzymes are also organic compounds, but their association with the apoenzyme is only transient. Therefore, the organic compounds tightly attached to