This document provides an introduction to biochemistry.
It begins by defining biochemistry as the science concerned with the chemical nature of living matter. Biochemistry has two branches-descriptive biochemistry which qualitatively and quantitatively characterizes cell components, and dynamic biochemistry which elucidates the nature and mechanisms of reactions between these components.
The document then discusses the hierarchy of molecular organization within cells from basic precursors to macromolecules and organelles. It provides details on the structure and functions of prokaryotic and eukaryotic cells as well as some of the major organelles found in eukaryotic cells like the plasma membrane, cytoskeleton, and cytoplasm.