AP BIOLOGY

Detailed explanation-1: -Enzymes: These are globular conjugated proteins that are also known as biological catalysts. They catalyze metabolic reactions by reducing the activation energy that increases the rate of the reaction. Some examples of protein enzymes are DNA polymerase, lysozyme, nitrogenase, and lipase.

Detailed explanation-2: -Enzymes Are Powerful and Highly Specific Catalysts This is the case for the large and very important class of proteins called enzymes. As described in Chapter 2, enzymes are remarkable molecules that determine all the chemical transformations that make and break covalent bonds in cells.

Detailed explanation-3: -Definition. An enzyme is a biological catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell.

Detailed explanation-4: -The answer is enzymes. Enzymes in our bodies are catalysts that speed up reactions by helping to lower the activation energy needed to start a reaction. Each enzyme molecule has a special place called the active site where another molecule, called the substrate, fits.

Detailed explanation-5: -Enzymes accelerate the rates of such reactions by well over a million-fold, so reactions that would take years in the absence of catalysis can occur in fractions of seconds if catalyzed by the appropriate enzyme.