Which of the following statements correctly differentiates protein-ligand interactions from enzyme-substrate interactions?

• A. Enzyme-substrate interactions involve reversible binding without any chemical reaction.
• B. Protein-ligand interactions involve reversible binding without converting the ligand into a product.
• C. Protein-ligand interactions result in the conversion of the ligand into a product.
• D. Enzyme-substrate interactions do not involve any binding between molecules.

Answer: (B)