Where does a substrate bind on an enzymevin order for a chemical reaction to take place? Enzyme-substrate complex Carbon molecules Active site Catalytic site

In order for a chemical reaction to take place, a substrate binds to the **active site** of an enzyme. The active site is a specific region on the enzyme where the substrate molecules fit and interact, forming an enzyme-substrate complex. This interaction facilitates the chemical reaction, allowing the substrate to be converted into products. To summarize: - **Enzyme-substrate complex**: This is the temporary complex formed when the substrate binds to the enzyme's active site. - **Carbon molecules**: These are not specifically related to the binding of substrates to enzymes. - **Active site**: This is the correct answer; it is where the substrate binds. - **Catalytic site**: This term can sometimes refer to the part of the active site that actually catalyzes the reaction, but the primary binding occurs at the active site. Thus, the correct answer is **Active site**.