Enzymes lower the activation energy necessary to transform a reactant into a product. On the left is a reaction that is not catalyzed by an enzyme (red), and on the right is one that is (green).

Life as we know it wouldn’t exist without enzymes. These tiny proteins, found in every living organism, are the catalysts ...

Cells constantly adjust the flow of molecules through metabolic pathways in response to energy needs. Learn how enzymes control these molecular transformations.

How does your body speed up these important reactions? 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 ...

Enzymes are primarily proteins, although some RNA molecules called ribozymes also exhibit enzymatic activity. Enzymes are biological catalysts that lower the activation energy of chemical reactions, ...

The binding of the enzyme to its substrate also lowers the activation energy of the reaction (amount of energy needed to make a reaction happen). If an enzyme is present, the amount of energy ...