Non-protein part of conjugated protein is called _.

Explanation

Option A: Coenzymes are small organic molecules that assist enzymes in carrying out specific reactions. They often act as carriers of chemical groups or electrons during enzymatic reactions. While coenzymes are important for enzyme function, they are not considered the non-protein part of a conjugated protein. Option B: A Co-factor is a non-protein molecule or ion that is required for the proper functioning of an enzyme. Co-factors can be either inorganic ions, such as metal ions, or organic molecules. They help enzymes catalyze reactions by providing additional chemical groups or facilitating certain steps of the reaction. However, co-factors are not typically part of conjugated proteins. Option C: The prosthetic group refers to the non-protein component of a conjugated protein. It is a tightly bound molecule that is essential for the protein's structure and function. Prosthetic groups can be various types of molecules, such as metal ions or organic molecules like heme in hemoglobin. They play a crucial role in the protein's overall function and often participate directly in the protein's catalytic activity or ligand binding. Option D: This option indicates that none of the provided options is the correct answer. However, in this case, the correct answer is indeed option C, prosthetic group.