Which type of biological molecule are enzymes primarily composed of?

Enzymes are primarily composed of proteins, which are large, complex molecules made up of long chains of amino acids. These proteins play a crucial role in biological processes by acting as catalysts that speed up chemical reactions in living organisms. Each enzyme has a specific structure that determines its function, which is related to how it interacts with the substrates it acts upon.

Proteins have unique shapes and properties that allow them to bind with specific molecules, facilitating various biochemical reactions necessary for life. The structure of enzymes includes an active site where substrates fit, enabling them to convert into products efficiently.

Other types of biological molecules, such as nucleotides, carbohydrates, and lipids, serve different roles within the cell. Nucleotides are the building blocks of nucleic acids like DNA and RNA, carbohydrates primarily serve as energy sources and structural components, and lipids form membranes and store energy. However, none of these perform the catalytic functions that enzymes do, underscoring the importance of proteins in biological reactions.